diff --git a/include/config.h b/include/config.h
index f1b1d91b..19c64850 100644
--- a/include/config.h
+++ b/include/config.h
@@ -113,6 +113,7 @@ public:
         this->baseGameVersion = BaseGameVersion::pokeemerald;
         this->useEncounterJson = true;
         this->useCustomBorderSize = false;
+        this->customScripts.clear();
     }
     void setBaseGameVersion(BaseGameVersion baseGameVersion);
     BaseGameVersion getBaseGameVersion();
@@ -121,8 +122,11 @@ public:
     void setUsePoryScript(bool usePoryScript);
     bool getUsePoryScript();
     void setProjectDir(QString projectDir);
+    QString getProjectDir();
     void setUseCustomBorderSize(bool enable);
     bool getUseCustomBorderSize();
+    void setCustomScripts(QList<QString> scripts);
+    QList<QString> getCustomScripts();
 protected:
     virtual QString getConfigFilepath() override;
     virtual void parseConfigKeyValue(QString key, QString value) override;
@@ -134,6 +138,7 @@ private:
     bool useEncounterJson;
     bool usePoryScript;
     bool useCustomBorderSize;
+    QList<QString> customScripts;
 };
 
 extern ProjectConfig projectConfig;
diff --git a/include/core/block.h b/include/core/block.h
index b31f18b4..798e179c 100644
--- a/include/core/block.h
+++ b/include/core/block.h
@@ -8,6 +8,7 @@ class Block
 public:
     Block();
     Block(uint16_t);
+    Block(uint16_t tile, uint16_t collision, uint16_t elevation);
     Block(const Block&);
     bool operator ==(Block);
     bool operator !=(Block);
diff --git a/include/core/map.h b/include/core/map.h
index 32eb6e70..a679a55b 100644
--- a/include/core/map.h
+++ b/include/core/map.h
@@ -74,8 +74,7 @@ public:
     void cacheBlockdata();
     void cacheCollision();
     Block *getBlock(int x, int y);
-    void setBlock(int x, int y, Block block);
-    void _setBlock(int x, int y, Block block);
+    void setBlock(int x, int y, Block block, bool enableScriptCallback = false);
     void floodFillCollisionElevation(int x, int y, uint16_t collision, uint16_t elevation);
     void _floodFillCollisionElevation(int x, int y, uint16_t collision, uint16_t elevation);
     void magicFillCollisionElevation(int x, int y, uint16_t collision, uint16_t elevation);
@@ -86,7 +85,7 @@ public:
     void removeEvent(Event*);
     void addEvent(Event*);
     QPixmap renderConnection(MapConnection, MapLayout *);
-    QPixmap renderBorder();
+    QPixmap renderBorder(bool ignoreCache = false);
     void setDimensions(int newWidth, int newHeight, bool setNewBlockdata = true);
     void setBorderDimensions(int newWidth, int newHeight, bool setNewBlockdata = true);
     void cacheBorder();
diff --git a/include/core/tileset.h b/include/core/tileset.h
index cf0bb67c..9113788a 100644
--- a/include/core/tileset.h
+++ b/include/core/tileset.h
@@ -28,13 +28,14 @@ public:
     QList<QImage> *tiles = nullptr;
     QList<Metatile*> *metatiles = nullptr;
     QList<QList<QRgb>> *palettes = nullptr;
+    QList<QList<QRgb>> *palettePreviews = nullptr;
 
     Tileset* copy();
 
     static Tileset* getBlockTileset(int, Tileset*, Tileset*);
     static Metatile* getMetatile(int, Tileset*, Tileset*);
-    static QList<QList<QRgb>> getBlockPalettes(Tileset*, Tileset*);
-    static QList<QRgb> getPalette(int, Tileset*, Tileset*);
+    static QList<QList<QRgb>> getBlockPalettes(Tileset*, Tileset*, bool useTruePalettes = false);
+    static QList<QRgb> getPalette(int, Tileset*, Tileset*, bool useTruePalettes = false);
     static bool metatileIsValid(uint16_t metatileId, Tileset *, Tileset *);
 
     bool appendToHeaders(QString headerFile, QString friendlyName);
diff --git a/include/editor.h b/include/editor.h
index 1f9d9232..baf32b5e 100644
--- a/include/editor.h
+++ b/include/editor.h
@@ -66,6 +66,9 @@ public:
     void displayMapGrid();
     void displayWildMonTables();
 
+    void updateMapBorder();
+    void updateMapConnections();
+
     void setEditingMap();
     void setEditingCollision();
     void setEditingObjects();
diff --git a/include/mainwindow.h b/include/mainwindow.h
index 1e5a65be..c4490965 100644
--- a/include/mainwindow.h
+++ b/include/mainwindow.h
@@ -10,6 +10,7 @@
 #include <QGraphicsSceneMouseEvent>
 #include <QCloseEvent>
 #include <QAbstractItemModel>
+#include <QJSValue>
 #include "project.h"
 #include "config.h"
 #include "map.h"
@@ -37,6 +38,74 @@ public:
     MainWindow(const MainWindow &) = delete;
     MainWindow & operator = (const MainWindow &) = delete;
 
+    // Scripting API
+    Q_INVOKABLE QJSValue getBlock(int x, int y);
+    void tryRedrawMapArea(bool forceRedraw);
+    void tryCommitMapChanges(bool commitChanges);
+    Q_INVOKABLE void setBlock(int x, int y, int tile, int collision, int elevation, bool forceRedraw = true, bool commitChanges = true);
+    Q_INVOKABLE void setBlocksFromSelection(int x, int y, bool forceRedraw = true, bool commitChanges = true);
+    Q_INVOKABLE int getMetatileId(int x, int y);
+    Q_INVOKABLE void setMetatileId(int x, int y, int metatileId, bool forceRedraw = true, bool commitChanges = true);
+    Q_INVOKABLE int getCollision(int x, int y);
+    Q_INVOKABLE void setCollision(int x, int y, int collision, bool forceRedraw = true, bool commitChanges = true);
+    Q_INVOKABLE int getElevation(int x, int y);
+    Q_INVOKABLE void setElevation(int x, int y, int elevation, bool forceRedraw = true, bool commitChanges = true);
+    Q_INVOKABLE void bucketFill(int x, int y, int metatileId, bool forceRedraw = true, bool commitChanges = true);
+    Q_INVOKABLE void bucketFillFromSelection(int x, int y, bool forceRedraw = true, bool commitChanges = true);
+    Q_INVOKABLE void magicFill(int x, int y, int metatileId, bool forceRedraw = true, bool commitChanges = true);
+    Q_INVOKABLE void magicFillFromSelection(int x, int y, bool forceRedraw = true, bool commitChanges = true);
+    Q_INVOKABLE void shift(int xDelta, int yDelta, bool forceRedraw = true, bool commitChanges = true);
+    Q_INVOKABLE void redraw();
+    Q_INVOKABLE void commit();
+    Q_INVOKABLE QJSValue getDimensions();
+    Q_INVOKABLE int getWidth();
+    Q_INVOKABLE int getHeight();
+    Q_INVOKABLE void setDimensions(int width, int height);
+    Q_INVOKABLE void setWidth(int width);
+    Q_INVOKABLE void setHeight(int height);
+    Q_INVOKABLE void clearOverlay();
+    Q_INVOKABLE void addText(QString text, int x, int y, QString color = "#000000", int fontSize = 12);
+    Q_INVOKABLE void addRect(int x, int y, int width, int height, QString color = "#000000");
+    Q_INVOKABLE void addFilledRect(int x, int y, int width, int height, QString color = "#000000");
+    Q_INVOKABLE void addImage(int x, int y, QString filepath);
+    void refreshAfterPaletteChange(Tileset *tileset);
+    void setTilesetPalette(Tileset *tileset, int paletteIndex, QList<QList<int>> colors);
+    Q_INVOKABLE void setPrimaryTilesetPalette(int paletteIndex, QList<QList<int>> colors);
+    Q_INVOKABLE void setPrimaryTilesetPalettes(QList<QList<QList<int>>> palettes);
+    Q_INVOKABLE void setSecondaryTilesetPalette(int paletteIndex, QList<QList<int>> colors);
+    Q_INVOKABLE void setSecondaryTilesetPalettes(QList<QList<QList<int>>> palettes);
+    QJSValue getTilesetPalette(QList<QList<QRgb>> *palettes, int paletteIndex);
+    QJSValue getTilesetPalettes(QList<QList<QRgb>> *palettes);
+    Q_INVOKABLE QJSValue getPrimaryTilesetPalette(int paletteIndex);
+    Q_INVOKABLE QJSValue getPrimaryTilesetPalettes();
+    Q_INVOKABLE QJSValue getSecondaryTilesetPalette(int paletteIndex);
+    Q_INVOKABLE QJSValue getSecondaryTilesetPalettes();
+    void refreshAfterPalettePreviewChange();
+    void setTilesetPalettePreview(Tileset *tileset, int paletteIndex, QList<QList<int>> colors);
+    Q_INVOKABLE void setPrimaryTilesetPalettePreview(int paletteIndex, QList<QList<int>> colors);
+    Q_INVOKABLE void setPrimaryTilesetPalettesPreview(QList<QList<QList<int>>> palettes);
+    Q_INVOKABLE void setSecondaryTilesetPalettePreview(int paletteIndex, QList<QList<int>> colors);
+    Q_INVOKABLE void setSecondaryTilesetPalettesPreview(QList<QList<QList<int>>> palettes);
+    Q_INVOKABLE QJSValue getPrimaryTilesetPalettePreview(int paletteIndex);
+    Q_INVOKABLE QJSValue getPrimaryTilesetPalettesPreview();
+    Q_INVOKABLE QJSValue getSecondaryTilesetPalettePreview(int paletteIndex);
+    Q_INVOKABLE QJSValue getSecondaryTilesetPalettesPreview();
+    Q_INVOKABLE QString getPrimaryTileset();
+    Q_INVOKABLE QString getSecondaryTileset();
+    Q_INVOKABLE void setPrimaryTileset(QString tileset);
+    Q_INVOKABLE void setSecondaryTileset(QString tileset);
+    Q_INVOKABLE void setGridVisibility(bool visible);
+    Q_INVOKABLE bool getGridVisibility();
+    Q_INVOKABLE void setBorderVisibility(bool visible);
+    Q_INVOKABLE bool getBorderVisibility();
+    Q_INVOKABLE void setSmartPathsEnabled(bool visible);
+    Q_INVOKABLE bool getSmartPathsEnabled();
+    Q_INVOKABLE void registerAction(QString functionName, QString actionName, QString shortcut = "");
+    Q_INVOKABLE void setTimeout(QJSValue callback, int milliseconds);
+    void invokeCallback(QJSValue callback);
+    Q_INVOKABLE void log(QString message);
+
+
 public slots:
     void scaleMapView(int);
 
@@ -189,6 +258,8 @@ private:
     DraggablePixmapItem *selectedBG;
     DraggablePixmapItem *selectedHealspot;
 
+    QList<QAction *> registeredActions;
+
     bool isProgrammaticEventTabChange;
     bool projectHasUnsavedChanges;
 
@@ -205,6 +276,7 @@ private:
     QString getDefaultMap();
     void setRecentMap(QString map_name);
     QStandardItem* createMapItem(QString mapName, int groupNum, int inGroupNum);
+    static bool mapDimensionsValid(int width, int height);
 
     void drawMapListIcons(QAbstractItemModel *model);
     void updateMapList();
diff --git a/include/project.h b/include/project.h
index e6daffb0..45b73c4e 100644
--- a/include/project.h
+++ b/include/project.h
@@ -142,7 +142,7 @@ public:
     void saveTilesetMetatileAttributes(Tileset*);
     void saveTilesetMetatiles(Tileset*);
     void saveTilesetTilesImage(Tileset*);
-    void saveTilesetPalettes(Tileset*, bool);
+    void saveTilesetPalettes(Tileset*);
 
     QString defaultSong;
     QStringList getSongNames();
diff --git a/include/scripting.h b/include/scripting.h
new file mode 100644
index 00000000..99daac89
--- /dev/null
+++ b/include/scripting.h
@@ -0,0 +1,43 @@
+#ifndef SCRIPTING_H
+#define SCRIPTING_H
+
+#include "mainwindow.h"
+#include "block.h"
+
+#include <QStringList>
+#include <QJSEngine>
+
+enum CallbackType {
+    OnProjectOpened,
+    OnProjectClosed,
+    OnBlockChanged,
+    OnMapOpened,
+};
+
+class Scripting
+{
+public:
+    Scripting(MainWindow *mainWindow);
+    static QJSValue fromBlock(Block block);
+    static QJSValue dimensions(int width, int height);
+    static QJSEngine *getEngine();
+    static void init(MainWindow *mainWindow);
+    static void registerAction(QString functionName, QString actionName);
+    static int numRegisteredActions();
+    static void invokeAction(QString actionName);
+    static void cb_ProjectOpened(QString projectPath);
+    static void cb_ProjectClosed(QString projectPath);
+    static void cb_MetatileChanged(int x, int y, Block prevBlock, Block newBlock);
+    static void cb_MapOpened(QString mapName);
+
+private:
+    QJSEngine *engine;
+    QStringList filepaths;
+    QList<QJSValue> modules;
+    QMap<QString, QString> registeredActions;
+
+    void loadModules(QStringList moduleFiles);
+    void invokeCallback(CallbackType type, QJSValueList args);
+};
+
+#endif // SCRIPTING_H
diff --git a/include/ui/graphicsview.h b/include/ui/graphicsview.h
index 0b3a12c7..85fb7a73 100644
--- a/include/ui/graphicsview.h
+++ b/include/ui/graphicsview.h
@@ -1,6 +1,7 @@
 #ifndef GRAPHICSVIEW_H
 #define GRAPHICSVIEW_H
 
+#include "overlay.h"
 #include <QGraphicsView>
 #include <QMouseEvent>
 
@@ -15,10 +16,12 @@ public:
 public:
 //    GraphicsView_Object object;
     Editor *editor;
+    Overlay overlay;
 protected:
     void mousePressEvent(QMouseEvent *event);
     void mouseMoveEvent(QMouseEvent *event);
     void mouseReleaseEvent(QMouseEvent *event);
+    void drawForeground(QPainter *painter, const QRectF &rect);
 };
 
 //Q_DECLARE_METATYPE(GraphicsView)
diff --git a/include/ui/imageproviders.h b/include/ui/imageproviders.h
index de54e1aa..89dfdce9 100644
--- a/include/ui/imageproviders.h
+++ b/include/ui/imageproviders.h
@@ -8,9 +8,9 @@
 
 QImage getCollisionMetatileImage(Block);
 QImage getCollisionMetatileImage(int, int);
-QImage getMetatileImage(uint16_t, Tileset*, Tileset*);
+QImage getMetatileImage(uint16_t, Tileset*, Tileset*, bool useTruePalettes = false);
 QImage getTileImage(uint16_t, Tileset*, Tileset*);
-QImage getPalettedTileImage(uint16_t, Tileset*, Tileset*, int);
+QImage getPalettedTileImage(uint16_t, Tileset*, Tileset*, int, bool useTruePalettes = false);
 QImage getGreyscaleTileImage(uint16_t tile, Tileset *primaryTileset, Tileset *secondaryTileset);
 
 static QList<QRgb> greyscalePalette({
diff --git a/include/ui/mappixmapitem.h b/include/ui/mappixmapitem.h
index e0111eb0..4ee10e56 100644
--- a/include/ui/mappixmapitem.h
+++ b/include/ui/mappixmapitem.h
@@ -38,17 +38,34 @@ public:
     virtual void paint(QGraphicsSceneMouseEvent*);
     virtual void floodFill(QGraphicsSceneMouseEvent*);
     virtual void magicFill(QGraphicsSceneMouseEvent*);
-    void _floodFill(int x, int y);
-    void _floodFillSmartPath(int initialX, int initialY);
+    void magicFill(int x, int y, uint16_t metatileId, bool fromScriptCall = false);
+    void magicFill(int x, int y, bool fromScriptCall = false);
+    void magicFill(
+            int initialX,
+            int initialY,
+            QPoint selectionDimensions,
+            QList<uint16_t> *selectedMetatiles,
+            QList<QPair<uint16_t, uint16_t>> *selectedCollisions,
+            bool fromScriptCall = false);
+    void floodFill(int x, int y, bool fromScriptCall = false);
+    void floodFill(int x, int y, uint16_t metatileId, bool fromScriptCall = false);
+    void floodFill(int initialX,
+                   int initialY,
+                   QPoint selectionDimensions,
+                   QList<uint16_t> *selectedMetatiles,
+                   QList<QPair<uint16_t, uint16_t>> *selectedCollisions,
+                   bool fromScriptCall = false);
+    void floodFillSmartPath(int initialX, int initialY, bool fromScriptCall = false);
     virtual void pick(QGraphicsSceneMouseEvent*);
     virtual void select(QGraphicsSceneMouseEvent*);
     virtual void shift(QGraphicsSceneMouseEvent*);
+    void shift(int xDelta, int yDelta);
     virtual void draw(bool ignoreCache = false);
     void updateMetatileSelection(QGraphicsSceneMouseEvent *event);
+    void paintNormal(int x, int y, bool fromScriptCall = false);
 
 private:
-    void paintNormal(int x, int y);
-    void paintSmartPath(int x, int y);
+    void paintSmartPath(int x, int y, bool fromScriptCall = false);
     static QList<int> smartPathTable;
 
 signals:
diff --git a/include/ui/overlay.h b/include/ui/overlay.h
new file mode 100644
index 00000000..a8e13337
--- /dev/null
+++ b/include/ui/overlay.h
@@ -0,0 +1,87 @@
+#ifndef OVERLAY_H
+#define OVERLAY_H
+
+#include <QList>
+#include <QString>
+#include <QColor>
+#include <QPainter>
+
+class OverlayItem {
+public:
+    OverlayItem() {}
+    virtual ~OverlayItem() {};
+    virtual void render(QPainter *painter) {};
+};
+
+class OverlayText : public OverlayItem {
+public:
+    OverlayText(QString text, int x, int y, QColor color, int fontSize) {
+        this->text = text;
+        this->x = x;
+        this->y = y;
+        this->color = color;
+        this->fontSize = fontSize;
+    }
+    ~OverlayText() {}
+    virtual void render(QPainter *painter);
+private:
+    QString text;
+    int x;
+    int y;
+    QColor color;
+    int fontSize;
+};
+
+class OverlayRect : public OverlayItem {
+public:
+    OverlayRect(int x, int y, int width, int height, QColor color, bool filled) {
+        this->x = x;
+        this->y = y;
+        this->width = width;
+        this->height = height;
+        this->color = color;
+        this->filled = filled;
+    }
+    ~OverlayRect() {}
+    virtual void render(QPainter *painter);
+private:
+    int x;
+    int y;
+    int width;
+    int height;
+    QColor color;
+    bool filled;
+};
+
+class OverlayImage : public OverlayItem {
+public:
+    OverlayImage(int x, int y, QImage image) {
+        this->x = x;
+        this->y = y;
+        this->image = image;
+    }
+    ~OverlayImage() {}
+    virtual void render(QPainter *painter);
+private:
+    int x;
+    int y;
+    QImage image;
+};
+
+class Overlay
+{
+public:
+    Overlay() {}
+    ~Overlay() {
+        this->clearItems();
+    }
+    QList<OverlayItem*> getItems();
+    void clearItems();
+    void addText(QString text, int x, int y, QString color = "#000000", int fontSize = 12);
+    void addRect(int x, int y, int width, int height, QString color = "#000000", bool filled = false);
+    void addImage(int x, int y, QString filepath);
+private:
+    QList<OverlayItem*> items;
+};
+
+#endif // OVERLAY_H
diff --git a/porymap.pro b/porymap.pro
index b53d94ae..0f600695 100644
--- a/porymap.pro
+++ b/porymap.pro
@@ -4,7 +4,7 @@
 #
 #-------------------------------------------------
 
-QT       += core gui
+QT       += core gui qml
 
 greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
 
@@ -31,11 +31,13 @@ SOURCES += src/core/block.cpp \
     src/core/regionmap.cpp \
     src/core/wildmoninfo.cpp \
     src/lib/orderedjson.cpp \
+    src/mainwindow_scriptapi.cpp \
     src/ui/aboutporymap.cpp \
     src/ui/bordermetatilespixmapitem.cpp \
     src/ui/collisionpixmapitem.cpp \
     src/ui/connectionpixmapitem.cpp \
     src/ui/currentselectedmetatilespixmapitem.cpp \
+    src/ui/overlay.cpp \
     src/ui/regionmaplayoutpixmapitem.cpp \
     src/ui/regionmapentriespixmapitem.cpp \
     src/ui/cursortilerect.cpp \
@@ -70,6 +72,7 @@ SOURCES += src/core/block.cpp \
     src/main.cpp \
     src/mainwindow.cpp \
     src/project.cpp \
+    src/scripting.cpp \
     src/settings.cpp \
     src/log.cpp \
     src/ui/newtilesetdialog.cpp
@@ -94,7 +97,7 @@ HEADERS  += include/core/block.h \
     include/core/wildmoninfo.h \
     include/lib/orderedmap.h \
     include/lib/orderedjson.h \
-    include/ui/aboutporymap.h \    
+    include/ui/aboutporymap.h \
     include/ui/bordermetatilespixmapitem.h \
     include/ui/collisionpixmapitem.h \
     include/ui/connectionpixmapitem.h \
@@ -133,9 +136,11 @@ HEADERS  += include/core/block.h \
     include/editor.h \
     include/mainwindow.h \
     include/project.h \
+    include/scripting.h \
     include/settings.h \
     include/log.h \
-    include/ui/newtilesetdialog.h
+    include/ui/newtilesetdialog.h \
+    include/ui/overlay.h
 
 FORMS    += forms/mainwindow.ui \
     forms/eventpropertiesframe.ui \
diff --git a/src/config.cpp b/src/config.cpp
index 80fcaa83..0c102cf6 100644
--- a/src/config.cpp
+++ b/src/config.cpp
@@ -36,7 +36,7 @@ void KeyValueConfigBase::load() {
     QTextStream in(&file);
     in.setCodec("UTF-8");
     QList<QString> configLines;
-    QRegularExpression re("^(?<key>.+)=(?<value>.+)$");
+    QRegularExpression re("^(?<key>.+)=(?<value>.*)$");
     while (!in.atEnd()) {
         QString line = in.readLine().trimmed();
         int commentIndex = line.indexOf("#");
@@ -380,6 +380,15 @@ void ProjectConfig::parseConfigKeyValue(QString key, QString value) {
         if (!ok) {
             logWarn(QString("Invalid config value for use_custom_border_size: '%1'. Must be 0 or 1.").arg(value));
         }
+    } else if (key == "custom_scripts") {
+        this->customScripts.clear();
+        QList<QString> paths = value.split(",");
+        paths.removeDuplicates();
+        for (QString script : paths) {
+            if (!script.isEmpty()) {
+                this->customScripts.append(script);
+            }
+        }
     } else {
         logWarn(QString("Invalid config key found in config file %1: '%2'").arg(this->getConfigFilepath()).arg(key));
     }
@@ -391,6 +400,7 @@ QMap<QString, QString> ProjectConfig::getKeyValueMap() {
     map.insert("use_encounter_json", QString::number(this->useEncounterJson));
     map.insert("use_poryscript", QString::number(this->usePoryScript));
     map.insert("use_custom_border_size", QString::number(this->useCustomBorderSize));
+    map.insert("custom_scripts", this->customScripts.join(","));
     return map;
 }
 
@@ -423,12 +433,17 @@ void ProjectConfig::onNewConfigFileCreated() {
     this->useCustomBorderSize = this->baseGameVersion == BaseGameVersion::pokefirered;
     this->useEncounterJson = true;
     this->usePoryScript = false;
+    this->customScripts.clear();
 }
 
 void ProjectConfig::setProjectDir(QString projectDir) {
     this->projectDir = projectDir;
 }
 
+QString ProjectConfig::getProjectDir() {
+    return this->projectDir;
+}
+
 void ProjectConfig::setBaseGameVersion(BaseGameVersion baseGameVersion) {
     this->baseGameVersion = baseGameVersion;
     this->save();
@@ -464,3 +479,12 @@ void ProjectConfig::setUseCustomBorderSize(bool enable) {
 bool ProjectConfig::getUseCustomBorderSize() {
     return this->useCustomBorderSize;
 }
+
+void ProjectConfig::setCustomScripts(QList<QString> scripts) {
+    this->customScripts = scripts;
+    this->save();
+}
+
+QList<QString> ProjectConfig::getCustomScripts() {
+    return this->customScripts;
+}
diff --git a/src/core/block.cpp b/src/core/block.cpp
index bc65c923..2a6b057d 100644
--- a/src/core/block.cpp
+++ b/src/core/block.cpp
@@ -3,6 +3,12 @@
 Block::Block() : tile(0), collision(0), elevation(0) {
 }
 
+Block::Block(uint16_t tile, uint16_t collision, uint16_t elevation) {
+    this->tile = tile;
+    this->collision = collision;
+    this->elevation = elevation;
+}
+
 Block::Block(uint16_t word)
 {
     tile = word & 0x3ff;
diff --git a/src/core/map.cpp b/src/core/map.cpp
index 667c151a..2e777190 100644
--- a/src/core/map.cpp
+++ b/src/core/map.cpp
@@ -2,6 +2,7 @@
 #include "historyitem.h"
 #include "map.h"
 #include "imageproviders.h"
+#include "scripting.h"
 
 #include <QTime>
 #include <QPainter>
@@ -220,7 +221,7 @@ QPixmap Map::render(bool ignoreCache = false, MapLayout * fromLayout) {
     return pixmap;
 }
 
-QPixmap Map::renderBorder() {
+QPixmap Map::renderBorder(bool ignoreCache) {
     bool changed_any = false, border_resized = false;
     int width_ = getBorderWidth();
     int height_ = getBorderHeight();
@@ -238,7 +239,7 @@ QPixmap Map::renderBorder() {
     }
     QPainter painter(&layout->border_image);
     for (int i = 0; i < layout->border->blocks->length(); i++) {
-        if (!border_resized && !borderBlockChanged(i, layout->cached_border)) {
+        if (!ignoreCache && (!border_resized && !borderBlockChanged(i, layout->cached_border))) {
             continue;
         }
 
@@ -363,10 +364,14 @@ Block* Map::getBlock(int x, int y) {
     return nullptr;
 }
 
-void Map::_setBlock(int x, int y, Block block) {
+void Map::setBlock(int x, int y, Block block, bool enableScriptCallback) {
     int i = y * getWidth() + x;
-    if (layout->blockdata && layout->blockdata->blocks) {
+    if (layout->blockdata && layout->blockdata->blocks && i < layout->blockdata->blocks->size()) {
+        Block prevBlock = layout->blockdata->blocks->value(i);
         layout->blockdata->blocks->replace(i, block);
+        if (enableScriptCallback) {
+            Scripting::cb_MetatileChanged(x, y, prevBlock, block);
+        }
     }
 }
 
@@ -390,7 +395,7 @@ void Map::_floodFillCollisionElevation(int x, int y, uint16_t collision, uint16_
 
             block->collision = collision;
             block->elevation = elevation;
-            _setBlock(x, y, *block);
+            setBlock(x, y, *block, true);
             if ((block = getBlock(x + 1, y)) && block->collision == old_coll && block->elevation == old_elev) {
                 todo.append(QPoint(x + 1, y));
             }
@@ -495,14 +500,6 @@ void Map::commit() {
     }
 }
 
-void Map::setBlock(int x, int y, Block block) {
-    Block *old_block = getBlock(x, y);
-    if (old_block && (*old_block) != block) {
-        _setBlock(x, y, block);
-        commit();
-    }
-}
-
 void Map::floodFillCollisionElevation(int x, int y, uint16_t collision, uint16_t elevation) {
     Block *block = getBlock(x, y);
     if (block && (block->collision != collision || block->elevation != elevation)) {
@@ -523,7 +520,7 @@ void Map::magicFillCollisionElevation(int initialX, int initialY, uint16_t colli
                 if (block && block->collision == old_coll && block->elevation == old_elev) {
                     block->collision = collision;
                     block->elevation = elevation;
-                    _setBlock(x, y, *block);
+                    setBlock(x, y, *block, true);
                 }
             }
         }
diff --git a/src/core/tileset.cpp b/src/core/tileset.cpp
index 450458b8..4c9a9fbb 100644
--- a/src/core/tileset.cpp
+++ b/src/core/tileset.cpp
@@ -46,6 +46,14 @@ Tileset* Tileset::copy() {
         }
         copy->palettes->append(copyPalette);
     }
+    copy->palettePreviews = new QList<QList<QRgb>>;
+    for (QList<QRgb> palette : *this->palettePreviews) {
+        QList<QRgb> copyPalette;
+        for (QRgb color : palette) {
+            copyPalette.append(color);
+        }
+        copy->palettePreviews->append(copyPalette);
+    }
     return copy;
 }
 
@@ -80,24 +88,27 @@ bool Tileset::metatileIsValid(uint16_t metatileId, Tileset *primaryTileset, Tile
     return true;
 }
 
-QList<QList<QRgb>> Tileset::getBlockPalettes(Tileset *primaryTileset, Tileset *secondaryTileset) {
+QList<QList<QRgb>> Tileset::getBlockPalettes(Tileset *primaryTileset, Tileset *secondaryTileset, bool useTruePalettes) {
     QList<QList<QRgb>> palettes;
+    auto primaryPalettes = useTruePalettes ? primaryTileset->palettes : primaryTileset->palettePreviews;
     for (int i = 0; i < Project::getNumPalettesPrimary(); i++) {
-        palettes.append(primaryTileset->palettes->at(i));
+        palettes.append(primaryPalettes->at(i));
     }
+    auto secondaryPalettes = useTruePalettes ? secondaryTileset->palettes : secondaryTileset->palettePreviews;
     for (int i = Project::getNumPalettesPrimary(); i < Project::getNumPalettesTotal(); i++) {
-        palettes.append(secondaryTileset->palettes->at(i));
+        palettes.append(secondaryPalettes->at(i));
     }
     return palettes;
 }
 
-QList<QRgb> Tileset::getPalette(int paletteId, Tileset *primaryTileset, Tileset *secondaryTileset) {
+QList<QRgb> Tileset::getPalette(int paletteId, Tileset *primaryTileset, Tileset *secondaryTileset, bool useTruePalettes) {
     QList<QRgb> paletteTable;
     Tileset *tileset = paletteId < Project::getNumPalettesPrimary()
             ? primaryTileset
             : secondaryTileset;
-    for (int i = 0; i < tileset->palettes->at(paletteId).length(); i++) {
-        paletteTable.append(tileset->palettes->at(paletteId).at(i));
+    auto palettes = useTruePalettes ? tileset->palettes : tileset->palettePreviews;
+    for (int i = 0; i < palettes->at(paletteId).length(); i++) {
+        paletteTable.append(palettes->at(paletteId).at(i));
     }
     return paletteTable;
 }
diff --git a/src/editor.cpp b/src/editor.cpp
index 985b2892..dcb32ee6 100644
--- a/src/editor.cpp
+++ b/src/editor.cpp
@@ -1444,6 +1444,29 @@ void Editor::displayMapBorder() {
     }
 }
 
+void Editor::updateMapBorder() {
+    QPixmap pixmap = this->map->renderBorder(true);
+    for (auto item : this->borderItems) {
+        item->setPixmap(pixmap);
+    }
+}
+
+void Editor::updateMapConnections() {
+    if (connection_items.size() != connection_edit_items.size())
+        return;
+
+    for (int i = 0; i < connection_items.size(); i++) {
+        Map *connected_map = project->getMap(connection_edit_items[i]->connection->map_name);
+        if (!connected_map)
+            continue;
+
+        QPixmap pixmap = connected_map->renderConnection(*(connection_edit_items[i]->connection), map->layout);
+        connection_items[i]->setPixmap(pixmap);
+        connection_edit_items[i]->basePixmap = pixmap;
+        connection_edit_items[i]->setPixmap(pixmap);
+    }
+}
+
 int Editor::getBorderDrawDistance(int dimension) {
     // Draw sufficient border blocks to fill the player's view (BORDER_DISTANCE)
     if (dimension >= BORDER_DISTANCE) {
diff --git a/src/mainwindow.cpp b/src/mainwindow.cpp
index 0adc83ab..7299ee13 100644
--- a/src/mainwindow.cpp
+++ b/src/mainwindow.cpp
@@ -8,6 +8,8 @@
 #include "ui_eventpropertiesframe.h"
 #include "bordermetatilespixmapitem.h"
 #include "currentselectedmetatilespixmapitem.h"
+#include "customattributestable.h"
+#include "scripting.h"
 #include "adjustingstackedwidget.h"
 
 #include <QFileDialog>
@@ -346,6 +348,14 @@ bool MainWindow::openProject(QString dir) {
 
     }
 
+    if (success) {
+        for (auto action : this->registeredActions) {
+            this->ui->menuTools->removeAction(action);
+        }
+        Scripting::init(this);
+        Scripting::cb_ProjectOpened(dir);
+    }
+
     return success;
 }
 
@@ -389,6 +399,7 @@ void MainWindow::on_action_Open_Project_triggered()
     }
     QString dir = getExistingDirectory(recent);
     if (!dir.isEmpty()) {
+        Scripting::cb_ProjectClosed(this->editor->project->root);
         porymapConfig.setRecentProject(dir);
         if (!openProject(dir)) {
             this->initWindow();
@@ -444,6 +455,8 @@ bool MainWindow::setMap(QString map_name, bool scrollTreeView) {
     setRecentMap(map_name);
     updateMapList();
     updateTilesetEditor();
+
+    Scripting::cb_MapOpened(map_name);
     return true;
 }
 
@@ -1052,6 +1065,7 @@ void MainWindow::on_actionNew_Tileset_triggered() {
             newSet->metatiles->append(mt);
         }
         newSet->palettes = new QList<QList<QRgb>>();
+        newSet->palettePreviews = new QList<QList<QRgb>>();
         newSet->palettePaths = *new QList<QString>();
         for(int i = 0; i < 16; ++i) {
             QList<QRgb> *currentPal = new QList<QRgb>();
@@ -1059,17 +1073,19 @@ void MainWindow::on_actionNew_Tileset_triggered() {
                 currentPal->append(qRgb(0,0,0));
             }
             newSet->palettes->append(*currentPal);
+            newSet->palettePreviews->append(*currentPal);
             QString fileName;
             fileName.sprintf("%02d.pal", i);
             newSet->palettePaths.append(fullDirectoryPath+"/palettes/" + fileName);
         }
         (*newSet->palettes)[0][1] = qRgb(255,0,255);
+        (*newSet->palettePreviews)[0][1] = qRgb(255,0,255);
         newSet->is_compressed = "TRUE";
         newSet->padding = "0";
         editor->project->saveTilesetTilesImage(newSet);
         editor->project->saveTilesetMetatiles(newSet);
         editor->project->saveTilesetMetatileAttributes(newSet);
-        editor->project->saveTilesetPalettes(newSet, !createTilesetDialog->isSecondary);
+        editor->project->saveTilesetPalettes(newSet);
 
         //append to tileset specific files
 
@@ -2303,7 +2319,7 @@ void MainWindow::on_pushButton_ChangeDimensions_clicked()
         int realWidth = widthSpinBox->value() + 15;
         int realHeight = heightSpinBox->value() + 14;
         int numMetatiles = realWidth * realHeight;
-        if (numMetatiles <= 0x2800) {
+        if (MainWindow::mapDimensionsValid(widthSpinBox->value(), heightSpinBox->value())) {
             dialog.accept();
         } else {
             QString errorText = QString("Error: The specified width and height are too large.\n"
@@ -2328,6 +2344,17 @@ void MainWindow::on_pushButton_ChangeDimensions_clicked()
     }
 }
 
+bool MainWindow::mapDimensionsValid(int width, int height) {
+    // Ensure width and height are an acceptable size.
+    // The maximum number of metatiles in a map is the following:
+    //    max = (width + 15) * (height + 14)
+    // This limit can be found in fieldmap.c in pokeruby/pokeemerald.
+    int realWidth = width + 15;
+    int realHeight = height + 14;
+    int numMetatiles = realWidth * realHeight;
+    return numMetatiles <= 0x2800;
+}
+
 void MainWindow::on_checkBox_smartPaths_stateChanged(int selected)
 {
     bool enabled = selected == Qt::Checked;
diff --git a/src/mainwindow_scriptapi.cpp b/src/mainwindow_scriptapi.cpp
new file mode 100644
index 00000000..7f6cc24c
--- /dev/null
+++ b/src/mainwindow_scriptapi.cpp
@@ -0,0 +1,509 @@
+#include "mainwindow.h"
+#include "ui_mainwindow.h"
+#include "scripting.h"
+
+QJSValue MainWindow::getBlock(int x, int y) {
+    if (!this->editor || !this->editor->map)
+        return QJSValue();
+    Block *block = this->editor->map->getBlock(x, y);
+    if (!block) {
+        return Scripting::fromBlock(Block());
+    }
+    return Scripting::fromBlock(*block);
+}
+
+void MainWindow::tryRedrawMapArea(bool forceRedraw) {
+    if (forceRedraw) {
+        this->editor->map_item->draw();
+        this->editor->collision_item->draw();
+    }
+}
+
+void MainWindow::tryCommitMapChanges(bool commitChanges) {
+    if (commitChanges) {
+        this->editor->map->commit();
+    }
+}
+
+void MainWindow::setBlock(int x, int y, int tile, int collision, int elevation, bool forceRedraw, bool commitChanges) {
+    if (!this->editor || !this->editor->map)
+        return;
+    this->editor->map->setBlock(x, y, Block(tile, collision, elevation));
+    this->tryCommitMapChanges(commitChanges);
+    this->tryRedrawMapArea(forceRedraw);
+}
+
+void MainWindow::setBlocksFromSelection(int x, int y, bool forceRedraw, bool commitChanges) {
+    if (this->editor && this->editor->map_item) {
+        this->editor->map_item->paintNormal(x, y, true);
+        this->tryCommitMapChanges(commitChanges);
+        this->tryRedrawMapArea(forceRedraw);
+    }
+}
+
+int MainWindow::getMetatileId(int x, int y) {
+    if (!this->editor || !this->editor->map)
+        return 0;
+    Block *block = this->editor->map->getBlock(x, y);
+    if (!block) {
+        return 0;
+    }
+    return block->tile;
+}
+
+void MainWindow::setMetatileId(int x, int y, int metatileId, bool forceRedraw, bool commitChanges) {
+    if (!this->editor || !this->editor->map)
+        return;
+    Block *block = this->editor->map->getBlock(x, y);
+    if (!block) {
+        return;
+    }
+    this->editor->map->setBlock(x, y, Block(metatileId, block->collision, block->elevation));
+    this->tryCommitMapChanges(commitChanges);
+    this->tryRedrawMapArea(forceRedraw);
+}
+
+int MainWindow::getCollision(int x, int y) {
+    if (!this->editor || !this->editor->map)
+        return 0;
+    Block *block = this->editor->map->getBlock(x, y);
+    if (!block) {
+        return 0;
+    }
+    return block->collision;
+}
+
+void MainWindow::setCollision(int x, int y, int collision, bool forceRedraw, bool commitChanges) {
+    if (!this->editor || !this->editor->map)
+        return;
+    Block *block = this->editor->map->getBlock(x, y);
+    if (!block) {
+        return;
+    }
+    this->editor->map->setBlock(x, y, Block(block->tile, collision, block->elevation));
+    this->tryCommitMapChanges(commitChanges);
+    this->tryRedrawMapArea(forceRedraw);
+}
+
+int MainWindow::getElevation(int x, int y) {
+    if (!this->editor || !this->editor->map)
+        return 0;
+    Block *block = this->editor->map->getBlock(x, y);
+    if (!block) {
+        return 0;
+    }
+    return block->elevation;
+}
+
+void MainWindow::setElevation(int x, int y, int elevation, bool forceRedraw, bool commitChanges) {
+    if (!this->editor || !this->editor->map)
+        return;
+    Block *block = this->editor->map->getBlock(x, y);
+    if (!block) {
+        return;
+    }
+    this->editor->map->setBlock(x, y, Block(block->tile, block->collision, elevation));
+    this->tryCommitMapChanges(commitChanges);
+    this->tryRedrawMapArea(forceRedraw);
+}
+
+void MainWindow::bucketFill(int x, int y, int metatileId, bool forceRedraw, bool commitChanges) {
+    if (!this->editor || !this->editor->map)
+        return;
+    this->editor->map_item->floodFill(x, y, metatileId, true);
+    this->tryCommitMapChanges(commitChanges);
+    this->tryRedrawMapArea(forceRedraw);
+}
+
+void MainWindow::bucketFillFromSelection(int x, int y, bool forceRedraw, bool commitChanges) {
+    if (!this->editor || !this->editor->map)
+        return;
+    this->editor->map_item->floodFill(x, y, true);
+    this->tryCommitMapChanges(commitChanges);
+    this->tryRedrawMapArea(forceRedraw);
+}
+
+void MainWindow::magicFill(int x, int y, int metatileId, bool forceRedraw, bool commitChanges) {
+    if (!this->editor || !this->editor->map)
+        return;
+    this->editor->map_item->magicFill(x, y, metatileId, true);
+    this->tryCommitMapChanges(commitChanges);
+    this->tryRedrawMapArea(forceRedraw);
+}
+
+void MainWindow::magicFillFromSelection(int x, int y, bool forceRedraw, bool commitChanges) {
+    if (!this->editor || !this->editor->map)
+        return;
+    this->editor->map_item->magicFill(x, y, true);
+    this->tryCommitMapChanges(commitChanges);
+    this->tryRedrawMapArea(forceRedraw);
+}
+
+void MainWindow::shift(int xDelta, int yDelta, bool forceRedraw, bool commitChanges) {
+    if (!this->editor || !this->editor->map)
+        return;
+    this->editor->map_item->shift(xDelta, yDelta);
+    this->tryCommitMapChanges(commitChanges);
+    this->tryRedrawMapArea(forceRedraw);
+}
+
+void MainWindow::redraw() {
+    this->tryRedrawMapArea(true);
+}
+
+void MainWindow::commit() {
+    this->tryCommitMapChanges(true);
+}
+
+QJSValue MainWindow::getDimensions() {
+    if (!this->editor || !this->editor->map)
+        return QJSValue();
+    return Scripting::dimensions(this->editor->map->getWidth(), this->editor->map->getHeight());
+}
+
+int MainWindow::getWidth() {
+    if (!this->editor || !this->editor->map)
+        return 0;
+    return this->editor->map->getWidth();
+}
+
+int MainWindow::getHeight() {
+    if (!this->editor || !this->editor->map)
+        return 0;
+    return this->editor->map->getHeight();
+}
+
+void MainWindow::setDimensions(int width, int height) {
+    if (!this->editor || !this->editor->map)
+        return;
+    if (!MainWindow::mapDimensionsValid(width, height))
+        return;
+    this->editor->map->setDimensions(width, height);
+    this->editor->map->commit();
+    this->onMapNeedsRedrawing();
+}
+
+void MainWindow::setWidth(int width) {
+    if (!this->editor || !this->editor->map)
+        return;
+    if (!MainWindow::mapDimensionsValid(width, this->editor->map->getHeight()))
+        return;
+    this->editor->map->setDimensions(width, this->editor->map->getHeight());
+    this->editor->map->commit();
+    this->onMapNeedsRedrawing();
+}
+
+void MainWindow::setHeight(int height) {
+    if (!this->editor || !this->editor->map)
+        return;
+    if (!MainWindow::mapDimensionsValid(this->editor->map->getWidth(), height))
+        return;
+    this->editor->map->setDimensions(this->editor->map->getWidth(), height);
+    this->editor->map->commit();
+    this->onMapNeedsRedrawing();
+}
+
+void MainWindow::clearOverlay() {
+    if (!this->ui || !this->ui->graphicsView_Map)
+        return;
+    this->ui->graphicsView_Map->overlay.clearItems();
+    this->ui->graphicsView_Map->scene()->update();
+}
+
+void MainWindow::addText(QString text, int x, int y, QString color, int fontSize) {
+    if (!this->ui || !this->ui->graphicsView_Map)
+        return;
+    this->ui->graphicsView_Map->overlay.addText(text, x, y, color, fontSize);
+    this->ui->graphicsView_Map->scene()->update();
+}
+
+void MainWindow::addRect(int x, int y, int width, int height, QString color) {
+    if (!this->ui || !this->ui->graphicsView_Map)
+        return;
+    this->ui->graphicsView_Map->overlay.addRect(x, y, width, height, color, false);
+    this->ui->graphicsView_Map->scene()->update();
+}
+
+void MainWindow::addFilledRect(int x, int y, int width, int height, QString color) {
+    if (!this->ui || !this->ui->graphicsView_Map)
+        return;
+    this->ui->graphicsView_Map->overlay.addRect(x, y, width, height, color, true);
+    this->ui->graphicsView_Map->scene()->update();
+}
+
+void MainWindow::addImage(int x, int y, QString filepath) {
+    if (!this->ui || !this->ui->graphicsView_Map)
+        return;
+    this->ui->graphicsView_Map->overlay.addImage(x, y, filepath);
+    this->ui->graphicsView_Map->scene()->update();
+}
+
+void MainWindow::refreshAfterPaletteChange(Tileset *tileset) {
+    if (this->tilesetEditor) {
+        this->tilesetEditor->setTilesets(this->editor->map->layout->tileset_primary_label, this->editor->map->layout->tileset_secondary_label);
+    }
+    this->editor->metatile_selector_item->draw();
+    this->editor->selected_border_metatiles_item->draw();
+    this->editor->map_item->draw(true);
+    this->editor->updateMapBorder();
+    this->editor->updateMapConnections();
+    this->editor->project->saveTilesetPalettes(tileset);
+}
+
+void MainWindow::setTilesetPalette(Tileset *tileset, int paletteIndex, QList<QList<int>> colors) {
+    if (!this->editor || !this->editor->map || !this->editor->map->layout)
+        return;
+    if (paletteIndex >= tileset->palettes->size())
+        return;
+    if (colors.size() != 16)
+        return;
+
+    for (int i = 0; i < 16; i++) {
+        if (colors[i].size() != 3)
+            continue;
+        (*tileset->palettes)[paletteIndex][i] = qRgb(colors[i][0], colors[i][1], colors[i][2]);
+        (*tileset->palettePreviews)[paletteIndex][i] = qRgb(colors[i][0], colors[i][1], colors[i][2]);
+    }
+}
+
+void MainWindow::setPrimaryTilesetPalette(int paletteIndex, QList<QList<int>> colors) {
+    if (!this->editor || !this->editor->map || !this->editor->map->layout || !this->editor->map->layout->tileset_primary)
+        return;
+    this->setTilesetPalette(this->editor->map->layout->tileset_primary, paletteIndex, colors);
+    this->refreshAfterPaletteChange(this->editor->map->layout->tileset_primary);
+}
+
+void MainWindow::setPrimaryTilesetPalettes(QList<QList<QList<int>>> palettes) {
+    if (!this->editor || !this->editor->map || !this->editor->map->layout || !this->editor->map->layout->tileset_primary)
+        return;
+    for (int i = 0; i < palettes.size(); i++) {
+        this->setTilesetPalette(this->editor->map->layout->tileset_primary, i, palettes[i]);
+    }
+    this->refreshAfterPaletteChange(this->editor->map->layout->tileset_primary);
+}
+
+void MainWindow::setSecondaryTilesetPalette(int paletteIndex, QList<QList<int>> colors) {
+    if (!this->editor || !this->editor->map || !this->editor->map->layout || !this->editor->map->layout->tileset_secondary)
+        return;
+    this->setTilesetPalette(this->editor->map->layout->tileset_secondary, paletteIndex, colors);
+    this->refreshAfterPaletteChange(this->editor->map->layout->tileset_secondary);
+}
+
+void MainWindow::setSecondaryTilesetPalettes(QList<QList<QList<int>>> palettes) {
+    if (!this->editor || !this->editor->map || !this->editor->map->layout || !this->editor->map->layout->tileset_secondary)
+        return;
+    for (int i = 0; i < palettes.size(); i++) {
+        this->setTilesetPalette(this->editor->map->layout->tileset_secondary, i, palettes[i]);
+    }
+    this->refreshAfterPaletteChange(this->editor->map->layout->tileset_secondary);
+}
+
+QJSValue MainWindow::getTilesetPalette(QList<QList<QRgb>> *palettes, int paletteIndex) {
+    if (paletteIndex >= palettes->size())
+        return QJSValue();
+
+    QList<QList<int>> palette;
+    for (auto color : palettes->value(paletteIndex)) {
+        palette.append(QList<int>({qRed(color), qGreen(color), qBlue(color)}));
+    }
+    return Scripting::getEngine()->toScriptValue(palette);
+}
+
+QJSValue MainWindow::getTilesetPalettes(QList<QList<QRgb>> *palettes) {
+    QList<QList<QList<int>>> outPalettes;
+    for (int i = 0; i < palettes->size(); i++) {
+        QList<QList<int>> colors;
+        for (auto color : palettes->value(i)) {
+            colors.append(QList<int>({qRed(color), qGreen(color), qBlue(color)}));
+        }
+        outPalettes.append(colors);
+    }
+    return Scripting::getEngine()->toScriptValue(outPalettes);
+}
+
+QJSValue MainWindow::getPrimaryTilesetPalette(int paletteIndex) {
+    if (!this->editor || !this->editor->map || !this->editor->map->layout || !this->editor->map->layout->tileset_primary)
+        return QJSValue();
+    return this->getTilesetPalette(this->editor->map->layout->tileset_primary->palettes, paletteIndex);
+}
+
+QJSValue MainWindow::getPrimaryTilesetPalettes() {
+    if (!this->editor || !this->editor->map || !this->editor->map->layout || !this->editor->map->layout->tileset_primary)
+        return QJSValue();
+    return this->getTilesetPalettes(this->editor->map->layout->tileset_primary->palettes);
+}
+
+QJSValue MainWindow::getSecondaryTilesetPalette(int paletteIndex) {
+    if (!this->editor || !this->editor->map || !this->editor->map->layout || !this->editor->map->layout->tileset_secondary)
+        return QJSValue();
+    return this->getTilesetPalette(this->editor->map->layout->tileset_secondary->palettes, paletteIndex);
+}
+
+QJSValue MainWindow::getSecondaryTilesetPalettes() {
+    if (!this->editor || !this->editor->map || !this->editor->map->layout || !this->editor->map->layout->tileset_secondary)
+        return QJSValue();
+    return this->getTilesetPalettes(this->editor->map->layout->tileset_secondary->palettes);
+}
+
+void MainWindow::refreshAfterPalettePreviewChange() {
+    this->editor->metatile_selector_item->draw();
+    this->editor->selected_border_metatiles_item->draw();
+    this->editor->map_item->draw(true);
+    this->editor->updateMapBorder();
+    this->editor->updateMapConnections();
+}
+
+void MainWindow::setTilesetPalettePreview(Tileset *tileset, int paletteIndex, QList<QList<int>> colors) {
+    if (!this->editor || !this->editor->map || !this->editor->map->layout)
+        return;
+    if (paletteIndex >= tileset->palettePreviews->size())
+        return;
+    if (colors.size() != 16)
+        return;
+
+    for (int i = 0; i < 16; i++) {
+        if (colors[i].size() != 3)
+            continue;
+        auto palettes = tileset->palettePreviews;
+        (*palettes)[paletteIndex][i] = qRgb(colors[i][0], colors[i][1], colors[i][2]);
+    }
+}
+
+void MainWindow::setPrimaryTilesetPalettePreview(int paletteIndex, QList<QList<int>> colors) {
+    if (!this->editor || !this->editor->map || !this->editor->map->layout || !this->editor->map->layout->tileset_primary)
+        return;
+    this->setTilesetPalettePreview(this->editor->map->layout->tileset_primary, paletteIndex, colors);
+    this->refreshAfterPalettePreviewChange();
+}
+
+void MainWindow::setPrimaryTilesetPalettesPreview(QList<QList<QList<int>>> palettes) {
+    if (!this->editor || !this->editor->map || !this->editor->map->layout || !this->editor->map->layout->tileset_primary)
+        return;
+    for (int i = 0; i < palettes.size(); i++) {
+        this->setTilesetPalettePreview(this->editor->map->layout->tileset_primary, i, palettes[i]);
+    }
+    this->refreshAfterPalettePreviewChange();
+}
+
+void MainWindow::setSecondaryTilesetPalettePreview(int paletteIndex, QList<QList<int>> colors) {
+    if (!this->editor || !this->editor->map || !this->editor->map->layout || !this->editor->map->layout->tileset_secondary)
+        return;
+    this->setTilesetPalettePreview(this->editor->map->layout->tileset_secondary, paletteIndex, colors);
+    this->refreshAfterPalettePreviewChange();
+}
+
+void MainWindow::setSecondaryTilesetPalettesPreview(QList<QList<QList<int>>> palettes) {
+    if (!this->editor || !this->editor->map || !this->editor->map->layout || !this->editor->map->layout->tileset_secondary)
+        return;
+    for (int i = 0; i < palettes.size(); i++) {
+        this->setTilesetPalettePreview(this->editor->map->layout->tileset_secondary, i, palettes[i]);
+    }
+    this->refreshAfterPalettePreviewChange();
+}
+
+QJSValue MainWindow::getPrimaryTilesetPalettePreview(int paletteIndex) {
+    if (!this->editor || !this->editor->map || !this->editor->map->layout || !this->editor->map->layout->tileset_primary)
+        return QJSValue();
+    return this->getTilesetPalette(this->editor->map->layout->tileset_primary->palettePreviews, paletteIndex);
+}
+
+QJSValue MainWindow::getPrimaryTilesetPalettesPreview() {
+    if (!this->editor || !this->editor->map || !this->editor->map->layout || !this->editor->map->layout->tileset_primary)
+        return QJSValue();
+    return this->getTilesetPalettes(this->editor->map->layout->tileset_primary->palettePreviews);
+}
+
+QJSValue MainWindow::getSecondaryTilesetPalettePreview(int paletteIndex) {
+    if (!this->editor || !this->editor->map || !this->editor->map->layout || !this->editor->map->layout->tileset_secondary)
+        return QJSValue();
+    return this->getTilesetPalette(this->editor->map->layout->tileset_secondary->palettePreviews, paletteIndex);
+}
+
+QJSValue MainWindow::getSecondaryTilesetPalettesPreview() {
+    if (!this->editor || !this->editor->map || !this->editor->map->layout || !this->editor->map->layout->tileset_secondary)
+        return QJSValue();
+    return this->getTilesetPalettes(this->editor->map->layout->tileset_secondary->palettePreviews);
+}
+
+QString MainWindow::getPrimaryTileset() {
+    if (!this->editor || !this->editor->map || !this->editor->map->layout || !this->editor->map->layout->tileset_primary)
+        return QString();
+    return this->editor->map->layout->tileset_primary->name;
+}
+
+QString MainWindow::getSecondaryTileset() {
+    if (!this->editor || !this->editor->map || !this->editor->map->layout || !this->editor->map->layout->tileset_secondary)
+        return QString();
+    return this->editor->map->layout->tileset_secondary->name;
+}
+
+void MainWindow::setPrimaryTileset(QString tileset) {
+    this->on_comboBox_PrimaryTileset_currentTextChanged(tileset);
+}
+
+void MainWindow::setSecondaryTileset(QString tileset) {
+    this->on_comboBox_SecondaryTileset_currentTextChanged(tileset);
+}
+
+void MainWindow::setGridVisibility(bool visible) {
+    this->ui->checkBox_ToggleGrid->setChecked(visible);
+}
+
+bool MainWindow::getGridVisibility() {
+    return this->ui->checkBox_ToggleGrid->isChecked();
+}
+
+void MainWindow::setBorderVisibility(bool visible) {
+    this->editor->toggleBorderVisibility(visible);
+}
+
+bool MainWindow::getBorderVisibility() {
+    return this->ui->checkBox_ToggleBorder->isChecked();
+}
+
+void MainWindow::setSmartPathsEnabled(bool visible) {
+    this->ui->checkBox_smartPaths->setChecked(visible);
+}
+
+bool MainWindow::getSmartPathsEnabled() {
+    return this->ui->checkBox_smartPaths->isChecked();
+}
+
+void MainWindow::registerAction(QString functionName, QString actionName, QString shortcut) {
+    if (!this->ui || !this->ui->menuTools)
+        return;
+
+    Scripting::registerAction(functionName, actionName);
+    if (Scripting::numRegisteredActions() == 1) {
+        QAction *section = this->ui->menuTools->addSection("Custom Actions");
+        this->registeredActions.append(section);
+    }
+    QAction *action = this->ui->menuTools->addAction(actionName, [actionName](){
+       Scripting::invokeAction(actionName);
+    });
+    if (!shortcut.isEmpty()) {
+        action->setShortcut(QKeySequence(shortcut));
+    }
+    this->registeredActions.append(action);
+}
+
+void MainWindow::setTimeout(QJSValue callback, int milliseconds) {
+  if (!callback.isCallable() || milliseconds < 0)
+      return;
+
+    QTimer *timer = new QTimer(0);
+    connect(timer, &QTimer::timeout, [=](){
+        this->invokeCallback(callback);
+    });
+    connect(timer, SIGNAL(timeout()), timer, SLOT(deleteLater()));
+    timer->setSingleShot(true);
+    timer->start(milliseconds);
+}
+
+void MainWindow::invokeCallback(QJSValue callback) {
+    callback.call();
+}
+
+void MainWindow::log(QString message) {
+    logInfo(message);
+}
diff --git a/src/project.cpp b/src/project.cpp
index 7fc42117..8f229863 100644
--- a/src/project.cpp
+++ b/src/project.cpp
@@ -1013,8 +1013,8 @@ void Project::saveTilesets(Tileset *primaryTileset, Tileset *secondaryTileset) {
     saveTilesetMetatiles(secondaryTileset);
     saveTilesetTilesImage(primaryTileset);
     saveTilesetTilesImage(secondaryTileset);
-    saveTilesetPalettes(primaryTileset, true);
-    saveTilesetPalettes(secondaryTileset, false);
+    saveTilesetPalettes(primaryTileset);
+    saveTilesetPalettes(secondaryTileset);
 }
 
 void Project::saveTilesetMetatileLabels(Tileset *primaryTileset, Tileset *secondaryTileset) {
@@ -1151,7 +1151,7 @@ void Project::saveTilesetTilesImage(Tileset *tileset) {
     exportIndexed4BPPPng(tileset->tilesImage, tileset->tilesImagePath);
 }
 
-void Project::saveTilesetPalettes(Tileset *tileset, bool /*primary*/) {
+void Project::saveTilesetPalettes(Tileset *tileset) {
     PaletteUtil paletteParser;
     for (int i = 0; i < Project::getNumPalettesTotal(); i++) {
         QString filepath = tileset->palettePaths.at(i);
@@ -1586,6 +1586,7 @@ void Project::loadTilesetAssets(Tileset* tileset) {
 
     // palettes
     QList<QList<QRgb>> *palettes = new QList<QList<QRgb>>;
+    QList<QList<QRgb>> *palettePreviews = new QList<QList<QRgb>>;
     for (int i = 0; i < tileset->palettePaths.length(); i++) {
         QList<QRgb> palette;
         QString path = tileset->palettePaths.value(i);
@@ -1620,8 +1621,10 @@ void Project::loadTilesetAssets(Tileset* tileset) {
         }
 
         palettes->append(palette);
+        palettePreviews->append(palette);
     }
     tileset->palettes = palettes;
+    tileset->palettePreviews = palettePreviews;
 }
 
 void Project::loadTilesetTiles(Tileset *tileset, QImage image) {
diff --git a/src/scripting.cpp b/src/scripting.cpp
new file mode 100644
index 00000000..2df636f8
--- /dev/null
+++ b/src/scripting.cpp
@@ -0,0 +1,156 @@
+#include "scripting.h"
+#include "log.h"
+
+QMap<CallbackType, QString> callbackFunctions = {
+    {OnProjectOpened, "onProjectOpened"},
+    {OnProjectClosed, "onProjectClosed"},
+    {OnBlockChanged, "onBlockChanged"},
+    {OnMapOpened, "onMapOpened"},
+};
+
+Scripting *instance = nullptr;
+
+void Scripting::init(MainWindow *mainWindow) {
+    if (instance) {
+        instance->engine->setInterrupted(true);
+        delete instance;
+    }
+    instance = new Scripting(mainWindow);
+}
+
+Scripting::Scripting(MainWindow *mainWindow) {
+    this->engine = new QJSEngine(mainWindow);
+    this->engine->installExtensions(QJSEngine::ConsoleExtension);
+    this->engine->globalObject().setProperty("map", this->engine->newQObject(mainWindow));
+    for (QString script : projectConfig.getCustomScripts()) {
+        this->filepaths.append(script);
+    }
+    this->loadModules(this->filepaths);
+}
+
+void Scripting::loadModules(QStringList moduleFiles) {
+    for (QString filepath : moduleFiles) {
+        QJSValue module = this->engine->importModule(filepath);
+        if (module.isError()) {
+            QString relativePath = QDir::cleanPath(projectConfig.getProjectDir() + QDir::separator() + filepath);
+            module = this->engine->importModule(relativePath);
+            if (module.isError()) {
+                logError(QString("Failed to load custom script file '%1'\nName: %2\nMessage: %3\nFile: %4\nLine Number: %5\nStack: %6")
+                         .arg(filepath)
+                         .arg(module.property("name").toString())
+                         .arg(module.property("message").toString())
+                         .arg(module.property("fileName").toString())
+                         .arg(module.property("lineNumber").toString())
+                         .arg(module.property("stack").toString()));
+                continue;
+            }
+        }
+
+        logInfo(QString("Successfully loaded custom script file '%1'").arg(filepath));
+        this->modules.append(module);
+    }
+}
+
+void Scripting::invokeCallback(CallbackType type, QJSValueList args) {
+    for (QJSValue module : this->modules) {
+        QString functionName = callbackFunctions[type];
+        QJSValue callbackFunction = module.property(functionName);
+        if (callbackFunction.isError()) {
+            continue;
+        }
+
+        QJSValue result = callbackFunction.call(args);
+        if (result.isError()) {
+            logError(QString("Module %1 encountered an error when calling '%2'").arg(module.toString()).arg(functionName));
+            continue;
+        }
+    }
+}
+
+void Scripting::registerAction(QString functionName, QString actionName) {
+    if (!instance) return;
+    instance->registeredActions.insert(actionName, functionName);
+}
+
+int Scripting::numRegisteredActions() {
+    if (!instance) return 0;
+    return instance->registeredActions.size();
+}
+
+void Scripting::invokeAction(QString actionName) {
+    if (!instance) return;
+    if (!instance->registeredActions.contains(actionName)) return;
+
+    QString functionName = instance->registeredActions.value(actionName);
+    for (QJSValue module : instance->modules) {
+        QJSValue callbackFunction = module.property(functionName);
+        if (callbackFunction.isError()) {
+            continue;
+        }
+
+        QJSValue result = callbackFunction.call(QJSValueList());
+        if (result.isError()) {
+            logError(QString("Module %1 encountered an error when calling '%2'").arg(module.toString()).arg(functionName));
+            continue;
+        }
+    }
+}
+
+void Scripting::cb_ProjectOpened(QString projectPath) {
+    if (!instance) return;
+
+    QJSValueList args {
+        projectPath,
+    };
+    instance->invokeCallback(OnProjectOpened, args);
+}
+
+void Scripting::cb_ProjectClosed(QString projectPath) {
+    if (!instance) return;
+
+    QJSValueList args {
+        projectPath,
+    };
+    instance->invokeCallback(OnProjectClosed, args);
+}
+
+void Scripting::cb_MetatileChanged(int x, int y, Block prevBlock, Block newBlock) {
+    if (!instance) return;
+
+    QJSValueList args {
+        x,
+        y,
+        instance->fromBlock(prevBlock),
+        instance->fromBlock(newBlock),
+    };
+    instance->invokeCallback(OnBlockChanged, args);
+}
+
+void Scripting::cb_MapOpened(QString mapName) {
+    if (!instance) return;
+
+    QJSValueList args {
+        mapName,
+    };
+    instance->invokeCallback(OnMapOpened, args);
+}
+
+QJSValue Scripting::fromBlock(Block block) {
+    QJSValue obj = instance->engine->newObject();
+    obj.setProperty("metatileId", block.tile);
+    obj.setProperty("collision", block.collision);
+    obj.setProperty("elevation", block.elevation);
+    obj.setProperty("rawValue", block.rawValue());
+    return obj;
+}
+
+QJSValue Scripting::dimensions(int width, int height) {
+    QJSValue obj = instance->engine->newObject();
+    obj.setProperty("width", width);
+    obj.setProperty("height", height);
+    return obj;
+}
+
+QJSEngine *Scripting::getEngine() {
+    return instance->engine;
+}
diff --git a/src/ui/collisionpixmapitem.cpp b/src/ui/collisionpixmapitem.cpp
index 94589a8d..4b4bd376 100644
--- a/src/ui/collisionpixmapitem.cpp
+++ b/src/ui/collisionpixmapitem.cpp
@@ -39,7 +39,7 @@ void CollisionPixmapItem::paint(QGraphicsSceneMouseEvent *event) {
         if (block) {
             block->collision = this->movementPermissionsSelector->getSelectedCollision();
             block->elevation = this->movementPermissionsSelector->getSelectedElevation();
-            map->_setBlock(x, y, *block);
+            map->setBlock(x, y, *block, true);
         }
         if (event->type() == QEvent::GraphicsSceneMouseRelease) {
             map->commit();
diff --git a/src/ui/graphicsview.cpp b/src/ui/graphicsview.cpp
index 778436df..19cf1a76 100644
--- a/src/ui/graphicsview.cpp
+++ b/src/ui/graphicsview.cpp
@@ -15,3 +15,9 @@ void GraphicsView::mouseMoveEvent(QMouseEvent *event) {
 void GraphicsView::mouseReleaseEvent(QMouseEvent *event) {
     QGraphicsView::mouseReleaseEvent(event);
 }
+
+void GraphicsView::drawForeground(QPainter *painter, const QRectF &rect) {
+    for (auto item : this->overlay.getItems()) {
+        item->render(painter);
+    }
+}
diff --git a/src/ui/imageproviders.cpp b/src/ui/imageproviders.cpp
index 286badb3..f060450e 100644
--- a/src/ui/imageproviders.cpp
+++ b/src/ui/imageproviders.cpp
@@ -13,7 +13,7 @@ QImage getCollisionMetatileImage(int collision, int elevation) {
     return collisionImage.toImage();
 }
 
-QImage getMetatileImage(uint16_t tile, Tileset *primaryTileset, Tileset *secondaryTileset) {
+QImage getMetatileImage(uint16_t tile, Tileset *primaryTileset, Tileset *secondaryTileset, bool useTruePalettes) {
     QImage metatile_image(16, 16, QImage::Format_RGBA8888);
 
     Metatile* metatile = Tileset::getMetatile(tile, primaryTileset, secondaryTileset);
@@ -27,7 +27,7 @@ QImage getMetatileImage(uint16_t tile, Tileset *primaryTileset, Tileset *seconda
         metatile_image.fill(Qt::magenta);
         return metatile_image;
     }
-    QList<QList<QRgb>> palettes = Tileset::getBlockPalettes(primaryTileset, secondaryTileset);
+    QList<QList<QRgb>> palettes = Tileset::getBlockPalettes(primaryTileset, secondaryTileset, useTruePalettes);
 
     QPainter metatile_painter(&metatile_image);
     for (int layer = 0; layer < 2; layer++)
@@ -95,8 +95,8 @@ QImage getColoredTileImage(uint16_t tile, Tileset *primaryTileset, Tileset *seco
     return tileImage;
 }
 
-QImage getPalettedTileImage(uint16_t tile, Tileset *primaryTileset, Tileset *secondaryTileset, int paletteId) {
-    QList<QRgb> palette = Tileset::getPalette(paletteId, primaryTileset, secondaryTileset);
+QImage getPalettedTileImage(uint16_t tile, Tileset *primaryTileset, Tileset *secondaryTileset, int paletteId, bool useTruePalettes) {
+    QList<QRgb> palette = Tileset::getPalette(paletteId, primaryTileset, secondaryTileset, useTruePalettes);
     return getColoredTileImage(tile, primaryTileset, secondaryTileset, palette);
 }
 
diff --git a/src/ui/mappixmapitem.cpp b/src/ui/mappixmapitem.cpp
index cf67e8c9..d6f4b2c4 100644
--- a/src/ui/mappixmapitem.cpp
+++ b/src/ui/mappixmapitem.cpp
@@ -42,24 +42,7 @@ void MapPixmapItem::shift(QGraphicsSceneMouseEvent *event) {
                 if (x != selection_origin.x() || y != selection_origin.y()) {
                     int xDelta = x - selection_origin.x();
                     int yDelta = y - selection_origin.y();
-                    Blockdata *backupBlockdata = map->layout->blockdata->copy();
-                    for (int i = 0; i < map->getWidth(); i++)
-                    for (int j = 0; j < map->getHeight(); j++) {
-                        int destX = i + xDelta;
-                        int destY = j + yDelta;
-                        if (destX < 0)
-                            do { destX += map->getWidth(); } while (destX < 0);
-                        if (destY < 0)
-                            do { destY += map->getHeight(); } while (destY < 0);
-                        destX %= map->getWidth();
-                        destY %= map->getHeight();
-
-                        int blockIndex = j * map->getWidth() + i;
-                        Block srcBlock = backupBlockdata->blocks->at(blockIndex);
-                        map->_setBlock(destX, destY, srcBlock);
-                    }
-
-                    delete backupBlockdata;
+                    this->shift(xDelta, yDelta);
                     selection_origin = QPoint(x, y);
                     selection.clear();
                     draw();
@@ -69,20 +52,43 @@ void MapPixmapItem::shift(QGraphicsSceneMouseEvent *event) {
     }
 }
 
-void MapPixmapItem::paintNormal(int x, int y) {
+void MapPixmapItem::shift(int xDelta, int yDelta) {
+    Blockdata *backupBlockdata = map->layout->blockdata->copy();
+    for (int i = 0; i < map->getWidth(); i++)
+    for (int j = 0; j < map->getHeight(); j++) {
+        int destX = i + xDelta;
+        int destY = j + yDelta;
+        if (destX < 0)
+            do { destX += map->getWidth(); } while (destX < 0);
+        if (destY < 0)
+            do { destY += map->getHeight(); } while (destY < 0);
+        destX %= map->getWidth();
+        destY %= map->getHeight();
+
+        int blockIndex = j * map->getWidth() + i;
+        Block srcBlock = backupBlockdata->blocks->at(blockIndex);
+        map->setBlock(destX, destY, srcBlock);
+    }
+
+    delete backupBlockdata;
+}
+
+void MapPixmapItem::paintNormal(int x, int y, bool fromScriptCall) {
     QPoint selectionDimensions = this->metatileSelector->getSelectionDimensions();
     QList<uint16_t> *selectedMetatiles = this->metatileSelector->getSelectedMetatiles();
     QList<QPair<uint16_t, uint16_t>> *selectedCollisions = this->metatileSelector->getSelectedCollisions();
+    int initialX = fromScriptCall ? x : this->paint_tile_initial_x;
+    int initialY = fromScriptCall ? y : this->paint_tile_initial_y;
 
     // Snap the selected position to the top-left of the block boundary.
     // This allows painting via dragging the mouse to tile the painted region.
-    int xDiff = x - this->paint_tile_initial_x;
-    int yDiff = y - this->paint_tile_initial_y;
+    int xDiff = x - initialX;
+    int yDiff = y - initialY;
     if (xDiff < 0 && xDiff % selectionDimensions.x() != 0) xDiff -= selectionDimensions.x();
     if (yDiff < 0 && yDiff % selectionDimensions.y() != 0) yDiff -= selectionDimensions.y();
 
-    x = this->paint_tile_initial_x + (xDiff / selectionDimensions.x()) * selectionDimensions.x();
-    y = this->paint_tile_initial_y + (yDiff / selectionDimensions.y()) * selectionDimensions.y();
+    x = initialX + (xDiff / selectionDimensions.x()) * selectionDimensions.x();
+    y = initialY + (yDiff / selectionDimensions.y()) * selectionDimensions.y();
 
     for (int i = 0; i < selectionDimensions.x() && i + x < map->getWidth(); i++)
     for (int j = 0; j < selectionDimensions.y() && j + y < map->getHeight(); j++) {
@@ -96,7 +102,7 @@ void MapPixmapItem::paintNormal(int x, int y) {
                 block->collision = selectedCollisions->at(index).first;
                 block->elevation = selectedCollisions->at(index).second;
             }
-            map->_setBlock(actualX, actualY, *block);
+            map->setBlock(actualX, actualY, *block, !fromScriptCall);
         }
     }
 }
@@ -125,7 +131,7 @@ QList<int> MapPixmapItem::smartPathTable = QList<int>({
 
 #define IS_SMART_PATH_TILE(block) (selectedMetatiles->contains(block->tile))
 
-void MapPixmapItem::paintSmartPath(int x, int y) {
+void MapPixmapItem::paintSmartPath(int x, int y, bool fromScriptCall) {
     QPoint selectionDimensions = this->metatileSelector->getSelectionDimensions();
     QList<uint16_t> *selectedMetatiles = this->metatileSelector->getSelectedMetatiles();
     QList<QPair<uint16_t, uint16_t>> *selectedCollisions = this->metatileSelector->getSelectedCollisions();
@@ -159,7 +165,7 @@ void MapPixmapItem::paintSmartPath(int x, int y) {
                 block->collision = openTileCollision;
                 block->elevation = openTileElevation;
             }
-            map->_setBlock(actualX, actualY, *block);
+            map->setBlock(actualX, actualY, *block, !fromScriptCall);
         }
     }
 
@@ -203,7 +209,7 @@ void MapPixmapItem::paintSmartPath(int x, int y) {
             block->collision = selectedCollisions->at(smartPathTable[id]).first;
             block->elevation = selectedCollisions->at(smartPathTable[id]).second;
         }
-        map->_setBlock(actualX, actualY, *block);
+        map->setBlock(actualX, actualY, *block, !fromScriptCall);
     }
 }
 
@@ -269,9 +275,9 @@ void MapPixmapItem::floodFill(QGraphicsSceneMouseEvent *event) {
             if (selectedMetatiles->count() > 1 || (block && block->tile != tile)) {
                 bool smartPathsEnabled = event->modifiers() & Qt::ShiftModifier;
                 if ((this->settings->smartPathsEnabled || smartPathsEnabled) && selectionDimensions.x() == 3 && selectionDimensions.y() == 3)
-                    this->_floodFillSmartPath(x, y);
+                    this->floodFillSmartPath(x, y);
                 else
-                    this->_floodFill(x, y);
+                    this->floodFill(x, y);
             }
         }
 
@@ -287,46 +293,80 @@ void MapPixmapItem::magicFill(QGraphicsSceneMouseEvent *event) {
             QPointF pos = event->pos();
             int initialX = static_cast<int>(pos.x()) / 16;
             int initialY = static_cast<int>(pos.y()) / 16;
-            Block *block = map->getBlock(initialX, initialY);
-
-            if (block) {
-                QList<uint16_t> *selectedMetatiles = this->metatileSelector->getSelectedMetatiles();
-                QList<QPair<uint16_t, uint16_t>> *selectedCollisions = this->metatileSelector->getSelectedCollisions();
-                bool setCollisions = selectedCollisions && selectedCollisions->length() == selectedMetatiles->length();
-                QPoint selectionDimensions = this->metatileSelector->getSelectionDimensions();
-                uint16_t tile = block->tile;
-
-                for (int y = 0; y < map->getHeight(); y++) {
-                    for (int x = 0; x < map->getWidth(); x++) {
-                        block = map->getBlock(x, y);
-                        if (block && block->tile == tile) {
-                            int xDiff = x - initialX;
-                            int yDiff = y - initialY;
-                            int i = xDiff % selectionDimensions.x();
-                            int j = yDiff % selectionDimensions.y();
-                            if (i < 0) i = selectionDimensions.x() + i;
-                            if (j < 0) j = selectionDimensions.y() + j;
-                            int index = j * selectionDimensions.x() + i;
-                            block->tile = selectedMetatiles->at(index);
-                            if (setCollisions) {
-                                block->collision = selectedCollisions->at(index).first;
-                                block->elevation = selectedCollisions->at(index).second;
-                            }
-                            map->_setBlock(x, y, *block);
-                        }
-                    }
-                }
-            }
+            this->magicFill(initialX, initialY);
         }
 
         draw();
     }
 }
 
-void MapPixmapItem::_floodFill(int initialX, int initialY) {
+void MapPixmapItem::magicFill(int x, int y, uint16_t metatileId, bool fromScriptCall) {
+    QPoint selectionDimensions(1, 1);
+    QList<uint16_t> *selectedMetatiles = new QList<uint16_t>({ metatileId });
+    this->magicFill(x, y, selectionDimensions, selectedMetatiles, nullptr, fromScriptCall);
+}
+
+void MapPixmapItem::magicFill(int x, int y, bool fromScriptCall) {
     QPoint selectionDimensions = this->metatileSelector->getSelectionDimensions();
     QList<uint16_t> *selectedMetatiles = this->metatileSelector->getSelectedMetatiles();
     QList<QPair<uint16_t, uint16_t>> *selectedCollisions = this->metatileSelector->getSelectedCollisions();
+    this->magicFill(x, y, selectionDimensions, selectedMetatiles, selectedCollisions, fromScriptCall);
+}
+
+void MapPixmapItem::magicFill(
+        int initialX,
+        int initialY,
+        QPoint selectionDimensions,
+        QList<uint16_t> *selectedMetatiles,
+        QList<QPair<uint16_t, uint16_t>> *selectedCollisions,
+        bool fromScriptCall) {
+    Block *block = map->getBlock(initialX, initialY);
+    if (block) {
+        bool setCollisions = selectedCollisions && selectedCollisions->length() == selectedMetatiles->length();
+        uint16_t tile = block->tile;
+        for (int y = 0; y < map->getHeight(); y++) {
+            for (int x = 0; x < map->getWidth(); x++) {
+                block = map->getBlock(x, y);
+                if (block && block->tile == tile) {
+                    int xDiff = x - initialX;
+                    int yDiff = y - initialY;
+                    int i = xDiff % selectionDimensions.x();
+                    int j = yDiff % selectionDimensions.y();
+                    if (i < 0) i = selectionDimensions.x() + i;
+                    if (j < 0) j = selectionDimensions.y() + j;
+                    int index = j * selectionDimensions.x() + i;
+                    block->tile = selectedMetatiles->at(index);
+                    if (setCollisions) {
+                        block->collision = selectedCollisions->at(index).first;
+                        block->elevation = selectedCollisions->at(index).second;
+                    }
+                    map->setBlock(x, y, *block, !fromScriptCall);
+                }
+            }
+        }
+    }
+}
+
+void MapPixmapItem::floodFill(int initialX, int initialY, bool fromScriptCall) {
+    QPoint selectionDimensions = this->metatileSelector->getSelectionDimensions();
+    QList<uint16_t> *selectedMetatiles = this->metatileSelector->getSelectedMetatiles();
+    QList<QPair<uint16_t, uint16_t>> *selectedCollisions = this->metatileSelector->getSelectedCollisions();
+    this->floodFill(initialX, initialY, selectionDimensions, selectedMetatiles, selectedCollisions, fromScriptCall);
+}
+
+void MapPixmapItem::floodFill(int initialX, int initialY, uint16_t metatileId, bool fromScriptCall) {
+    QPoint selectionDimensions(1, 1);
+    QList<uint16_t> *selectedMetatiles = new QList<uint16_t>({ metatileId });
+    this->floodFill(initialX, initialY, selectionDimensions, selectedMetatiles, nullptr, fromScriptCall);
+}
+
+void MapPixmapItem::floodFill(
+        int initialX,
+        int initialY,
+        QPoint selectionDimensions,
+        QList<uint16_t> *selectedMetatiles,
+        QList<QPair<uint16_t, uint16_t>> *selectedCollisions,
+        bool fromScriptCall) {
     bool setCollisions = selectedCollisions && selectedCollisions->length() == selectedMetatiles->length();
 
     int numMetatiles = map->getWidth() * map->getHeight();
@@ -362,7 +402,7 @@ void MapPixmapItem::_floodFill(int initialX, int initialY) {
                 block->collision = selectedCollisions->at(index).first;
                 block->elevation = selectedCollisions->at(index).second;
             }
-            map->_setBlock(x, y, *block);
+            map->setBlock(x, y, *block, !fromScriptCall);
         }
         if (!visited[x + 1 + y * map->getWidth()] && (block = map->getBlock(x + 1, y)) && block->tile == old_tile) {
             todo.append(QPoint(x + 1, y));
@@ -385,7 +425,7 @@ void MapPixmapItem::_floodFill(int initialX, int initialY) {
     delete[] visited;
 }
 
-void MapPixmapItem::_floodFillSmartPath(int initialX, int initialY) {
+void MapPixmapItem::floodFillSmartPath(int initialX, int initialY, bool fromScriptCall) {
     QPoint selectionDimensions = this->metatileSelector->getSelectionDimensions();
     QList<uint16_t> *selectedMetatiles = this->metatileSelector->getSelectedMetatiles();
     QList<QPair<uint16_t, uint16_t>> *selectedCollisions = this->metatileSelector->getSelectedCollisions();
@@ -427,7 +467,7 @@ void MapPixmapItem::_floodFillSmartPath(int initialX, int initialY) {
             block->collision = openTileCollision;
             block->elevation = openTileElevation;
         }
-        map->_setBlock(x, y, *block);
+        map->setBlock(x, y, *block, !fromScriptCall);
         if ((block = map->getBlock(x + 1, y)) && block->tile == old_tile) {
             todo.append(QPoint(x + 1, y));
         }
@@ -482,7 +522,7 @@ void MapPixmapItem::_floodFillSmartPath(int initialX, int initialY) {
             block->collision = selectedCollisions->at(smartPathTable[id]).first;
             block->elevation = selectedCollisions->at(smartPathTable[id]).second;
         }
-        map->_setBlock(x, y, *block);
+        map->setBlock(x, y, *block, !fromScriptCall);
 
         // Visit neighbors if they are smart-path tiles, and don't revisit any.
         if (!visited[x + 1 + y * map->getWidth()] && (block = map->getBlock(x + 1, y)) && IS_SMART_PATH_TILE(block)) {
diff --git a/src/ui/metatilelayersitem.cpp b/src/ui/metatilelayersitem.cpp
index 774e1388..cf4c3b9f 100644
--- a/src/ui/metatilelayersitem.cpp
+++ b/src/ui/metatilelayersitem.cpp
@@ -18,7 +18,7 @@ void MetatileLayersItem::draw() {
     QPainter painter(&pixmap);
     for (int i = 0; i < 8; i++) {
         Tile tile = this->metatile->tiles->at(i);
-        QImage tileImage = getPalettedTileImage(tile.tile, this->primaryTileset, this->secondaryTileset, tile.palette)
+        QImage tileImage = getPalettedTileImage(tile.tile, this->primaryTileset, this->secondaryTileset, tile.palette, true)
                 .mirrored(tile.xflip, tile.yflip)
                 .scaled(16, 16);
         painter.drawImage(tileCoords.at(i), tileImage);
diff --git a/src/ui/overlay.cpp b/src/ui/overlay.cpp
new file mode 100644
index 00000000..004a1fed
--- /dev/null
+++ b/src/ui/overlay.cpp
@@ -0,0 +1,45 @@
+#include "overlay.h"
+
+void OverlayText::render(QPainter *painter) {
+    QFont font = painter->font();
+    font.setPixelSize(this->fontSize);
+    painter->setFont(font);
+    painter->setPen(this->color);
+    painter->drawText(this->x, this->y, this->text);
+}
+
+void OverlayRect::render(QPainter *painter) {
+    if (this->filled) {
+        painter->fillRect(this->x, this->y, this->width, this->height, this->color);
+    } else {
+        painter->setPen(this->color);
+        painter->drawRect(this->x, this->y, this->width, this->height);
+    }
+}
+
+void OverlayImage::render(QPainter *painter) {
+    painter->drawImage(this->x, this->y, this->image);
+}
+
+void Overlay::clearItems() {
+    for (auto item : this->items) {
+        delete item;
+    }
+    this->items.clear();
+}
+
+QList<OverlayItem*> Overlay::getItems() {
+    return this->items;
+}
+
+void Overlay::addText(QString text, int x, int y, QString color, int fontSize) {
+    this->items.append(new OverlayText(text, x, y, QColor(color), fontSize));
+}
+
+void Overlay::addRect(int x, int y, int width, int height, QString color, bool filled) {
+    this->items.append(new OverlayRect(x, y, width, height, QColor(color), filled));
+}
+
+void Overlay::addImage(int x, int y, QString filepath) {
+    this->items.append(new OverlayImage(x, y, QImage(filepath)));
+}
diff --git a/src/ui/paletteeditor.cpp b/src/ui/paletteeditor.cpp
index 87169784..fd9eeb9a 100644
--- a/src/ui/paletteeditor.cpp
+++ b/src/ui/paletteeditor.cpp
@@ -203,6 +203,7 @@ void PaletteEditor::setColor(int colorIndex) {
             ? this->primaryTileset
             : this->secondaryTileset;
     (*tileset->palettes)[paletteNum][colorIndex] = qRgb(red, green, blue);
+    (*tileset->palettePreviews)[paletteNum][colorIndex] = qRgb(red, green, blue);
     this->refreshColor(colorIndex);
     this->commitEditHistory(paletteNum);
     emit this->changedPaletteColor();
@@ -246,8 +247,10 @@ void PaletteEditor::setColorsFromHistory(PaletteHistoryItem *history, int palett
     for (int i = 0; i < 16; i++) {
         if (paletteId < Project::getNumPalettesPrimary()) {
             (*this->primaryTileset->palettes)[paletteId][i] = history->colors.at(i);
+            (*this->primaryTileset->palettePreviews)[paletteId][i] = history->colors.at(i);
         } else {
             (*this->secondaryTileset->palettes)[paletteId][i] = history->colors.at(i);
+            (*this->secondaryTileset->palettePreviews)[paletteId][i] = history->colors.at(i);
         }
     }
 
@@ -296,8 +299,10 @@ void PaletteEditor::on_actionImport_Palette_triggered()
     for (int i = 0; i < 16; i++) {
         if (paletteId < Project::getNumPalettesPrimary()) {
             (*this->primaryTileset->palettes)[paletteId][i] = palette.at(i);
+            (*this->primaryTileset->palettePreviews)[paletteId][i] = palette.at(i);
         } else {
             (*this->secondaryTileset->palettes)[paletteId][i] = palette.at(i);
+            (*this->secondaryTileset->palettePreviews)[paletteId][i] = palette.at(i);
         }
     }
 
diff --git a/src/ui/tileseteditor.cpp b/src/ui/tileseteditor.cpp
index 069a9e23..3b09a069 100644
--- a/src/ui/tileseteditor.cpp
+++ b/src/ui/tileseteditor.cpp
@@ -177,7 +177,7 @@ void TilesetEditor::drawSelectedTiles() {
     int tileIndex = 0;
     for (int j = 0; j < dimensions.y(); j++) {
         for (int i = 0; i < dimensions.x(); i++) {
-            QImage tileImage = getPalettedTileImage(tiles.at(tileIndex).tile, this->primaryTileset, this->secondaryTileset, tiles.at(tileIndex).palette)
+            QImage tileImage = getPalettedTileImage(tiles.at(tileIndex).tile, this->primaryTileset, this->secondaryTileset, tiles.at(tileIndex).palette, true)
                     .mirrored(tiles.at(tileIndex).xflip, tiles.at(tileIndex).yflip)
                     .scaled(16, 16);
             tileIndex++;
diff --git a/src/ui/tileseteditormetatileselector.cpp b/src/ui/tileseteditormetatileselector.cpp
index eae7d4cc..b5732c99 100644
--- a/src/ui/tileseteditormetatileselector.cpp
+++ b/src/ui/tileseteditormetatileselector.cpp
@@ -22,7 +22,7 @@ void TilesetEditorMetatileSelector::draw() {
         if (i >= primaryLength) {
             tile += Project::getNumMetatilesPrimary() - primaryLength;
         }
-        QImage metatile_image = getMetatileImage(tile, this->primaryTileset, this->secondaryTileset).scaled(32, 32);
+        QImage metatile_image = getMetatileImage(tile, this->primaryTileset, this->secondaryTileset, true).scaled(32, 32);
         int map_y = i / this->numMetatilesWide;
         int map_x = i % this->numMetatilesWide;
         QPoint metatile_origin = QPoint(map_x * 32, map_y * 32);
diff --git a/src/ui/tileseteditortileselector.cpp b/src/ui/tileseteditortileselector.cpp
index d41cc754..40d58952 100644
--- a/src/ui/tileseteditortileselector.cpp
+++ b/src/ui/tileseteditortileselector.cpp
@@ -22,19 +22,19 @@ void TilesetEditorTileSelector::draw() {
     int primaryLength = this->primaryTileset->tiles->length();
     int secondaryLength = this->secondaryTileset->tiles->length();
     int height = totalTiles / this->numTilesWide;
-    QList<QRgb> palette = Tileset::getPalette(this->paletteId, this->primaryTileset, this->secondaryTileset);
+    QList<QRgb> palette = Tileset::getPalette(this->paletteId, this->primaryTileset, this->secondaryTileset, true);
     QImage image(this->numTilesWide * 16, height * 16, QImage::Format_RGBA8888);
 
     QPainter painter(&image);
     for (uint16_t tile = 0; tile < totalTiles; tile++) {
         QImage tileImage;
         if (tile < primaryLength) {
-            tileImage = getPalettedTileImage(tile, this->primaryTileset, this->secondaryTileset, this->paletteId).scaled(16, 16);
+            tileImage = getPalettedTileImage(tile, this->primaryTileset, this->secondaryTileset, this->paletteId, true).scaled(16, 16);
         } else if (tile < Project::getNumTilesPrimary()) {
             tileImage = QImage(16, 16, QImage::Format_RGBA8888);
             tileImage.fill(palette.at(0));
         } else if (tile < Project::getNumTilesPrimary() + secondaryLength) {
-            tileImage = getPalettedTileImage(tile, this->primaryTileset, this->secondaryTileset, this->paletteId).scaled(16, 16);
+            tileImage = getPalettedTileImage(tile, this->primaryTileset, this->secondaryTileset, this->paletteId, true).scaled(16, 16);
         } else {
             tileImage = QImage(16, 16, QImage::Format_RGBA8888);
             QPainter painter(&tileImage);
@@ -224,7 +224,7 @@ QImage TilesetEditorTileSelector::buildPrimaryTilesIndexedImage() {
     // Image is first converted using greyscale so that palettes with duplicate colors
     // are properly represented in the final image.
     QImage indexedImage = image.convertToFormat(QImage::Format::Format_Indexed8, greyscalePalette.toVector());
-    QList<QRgb> palette = Tileset::getPalette(this->paletteId, this->primaryTileset, this->secondaryTileset);
+    QList<QRgb> palette = Tileset::getPalette(this->paletteId, this->primaryTileset, this->secondaryTileset, true);
     indexedImage.setColorTable(palette.toVector());
     return indexedImage;
 }
@@ -261,7 +261,7 @@ QImage TilesetEditorTileSelector::buildSecondaryTilesIndexedImage() {
     // Image is first converted using greyscale so that palettes with duplicate colors
     // are properly represented in the final image.
     QImage indexedImage = image.convertToFormat(QImage::Format::Format_Indexed8, greyscalePalette.toVector());
-    QList<QRgb> palette = Tileset::getPalette(this->paletteId, this->primaryTileset, this->secondaryTileset);
+    QList<QRgb> palette = Tileset::getPalette(this->paletteId, this->primaryTileset, this->secondaryTileset, true);
     indexedImage.setColorTable(palette.toVector());
     return indexedImage;
 }