diff --git a/src/jsapi.c b/src/jsapi.c
index 23c6449..858b150 100644
--- a/src/jsapi.c
+++ b/src/jsapi.c
@@ -809,7 +809,7 @@ void callJavascriptTick(tic_machine* machine)
 	}
 }
 
-void callJavascriptScanline(tic_mem* memory, s32 row)
+void callJavascriptScanline(tic_mem* memory, s32 row, void* data)
 {
 	tic_machine* machine = (tic_machine*)memory;
 	duk_context* duk = machine->js;
@@ -830,7 +830,7 @@ void callJavascriptScanline(tic_mem* memory, s32 row)
 	else duk_pop(duk);
 }
 
-void callJavascriptOverlap(tic_mem* memory)
+void callJavascriptOverlap(tic_mem* memory, void* data)
 {
 	tic_machine* machine = (tic_machine*)memory;
 	duk_context* duk = machine->js;
diff --git a/src/luaapi.c b/src/luaapi.c
index b8931b5..638d803 100644
--- a/src/luaapi.c
+++ b/src/luaapi.c
@@ -1227,7 +1227,7 @@ void callLuaTick(tic_machine* machine)
  	}
 }
 
-void callLuaScanline(tic_mem* memory, s32 row)
+void callLuaScanline(tic_mem* memory, s32 row, void* data)
 {
 	tic_machine* machine = (tic_machine*)memory;
 	lua_State* lua = machine->lua;
@@ -1247,7 +1247,7 @@ void callLuaScanline(tic_mem* memory, s32 row)
 	}
 }
 
-void callLuaOverlap(tic_mem* memory)
+void callLuaOverlap(tic_mem* memory, void* data)
 {
 	tic_machine* machine = (tic_machine*)memory;
 	lua_State* lua = machine->lua;
diff --git a/src/machine.h b/src/machine.h
index 529d1b6..1f966b6 100644
--- a/src/machine.h
+++ b/src/machine.h
@@ -140,8 +140,8 @@ bool initJavascript(tic_machine* machine, const char* code);
 void callLuaTick(tic_machine* machine);
 void callJavascriptTick(tic_machine* machine);
 
-void callLuaScanline(tic_mem* memory, s32 row);
-void callJavascriptScanline(tic_mem* memory, s32 row);
+void callLuaScanline(tic_mem* memory, s32 row, void* data);
+void callJavascriptScanline(tic_mem* memory, s32 row, void* data);
 
-void callLuaOverlap(tic_mem* memory);
-void callJavascriptOverlap(tic_mem* memory);
+void callLuaOverlap(tic_mem* memory, void* data);
+void callJavascriptOverlap(tic_mem* memory, void* data);
diff --git a/src/map.c b/src/map.c
index 4c4538d..c18b9ff 100644
--- a/src/map.c
+++ b/src/map.c
@@ -349,6 +349,13 @@ static void drawSheet(Map* map, s32 x, s32 y)
 	SDL_Rect rect = {x, y, TIC_SPRITESHEET_SIZE, TIC_SPRITESHEET_SIZE};
 
 	map->tic->api.rect_border(map->tic, rect.x - 1, rect.y - 1, rect.w + 2, rect.h + 2, (tic_color_white));
+}
+
+static void drawSheetOvr(Map* map, s32 x, s32 y)
+{
+	if(!map->sheet.show)return;
+
+	SDL_Rect rect = {x, y, TIC_SPRITESHEET_SIZE, TIC_SPRITESHEET_SIZE};
 
 	if(checkMousePos(&rect))
 	{
@@ -821,6 +828,8 @@ static void drawSelection(Map* map)
 
 static void drawGrid(Map* map)
 {
+	tic_mem* tic = map->tic;
+
 	s32 scrollX = map->scroll.x % TIC_SPRITESIZE;
 	s32 scrollY = map->scroll.y % TIC_SPRITESIZE;
 
@@ -828,10 +837,9 @@ static void drawGrid(Map* map)
 	{
 		if(j >= 0 && j < TIC80_HEIGHT)
 			for(s32 i = 0; i < TIC80_WIDTH; i++)
-			{
-				s32 index = i + j*TIC80_WIDTH;
-				u8 color = tic_tool_peek4(map->tic->ram.vram.screen.data, index);
-				tic_tool_poke4(map->tic->ram.vram.screen.data, index, (color+1)%TIC_PALETTE_SIZE);
+			{				
+				u8 color = tic->api.get_pixel(tic, i, j);
+				tic->api.pixel(tic, i, j, (color+1)%TIC_PALETTE_SIZE);
 			}
 	}
 
@@ -842,15 +850,14 @@ static void drawGrid(Map* map)
 			{
 				if((i+scrollY) % TIC_SPRITESIZE)
 				{
-					s32 index = j + i*TIC80_WIDTH;
-					u8 color = tic_tool_peek4(map->tic->ram.vram.screen.data, index);
-					tic_tool_poke4(map->tic->ram.vram.screen.data, index, (color+1)%TIC_PALETTE_SIZE);						
+					u8 color = tic->api.get_pixel(tic, j, i);
+					tic->api.pixel(tic, j, i, (color+1)%TIC_PALETTE_SIZE);					
 				}
 			}
 	}
 }
 
-static void drawMap(Map* map)
+static void drawMapOvr(Map* map)
 {
 	SDL_Rect rect = {MAP_X, MAP_Y, MAP_WIDTH, MAP_HEIGHT};
 
@@ -858,7 +865,7 @@ static void drawMap(Map* map)
 	s32 scrollY = map->scroll.y % TIC_SPRITESIZE;
 
 	map->tic->api.map(map->tic, &map->tic->cart.gfx, map->scroll.x / TIC_SPRITESIZE, map->scroll.y / TIC_SPRITESIZE, 
-		TIC_MAP_SCREEN_WIDTH + 1, TIC_MAP_SCREEN_HEIGHT + 1, -scrollX, -scrollY, 0, 1);
+		TIC_MAP_SCREEN_WIDTH + 1, TIC_MAP_SCREEN_HEIGHT + 1, -scrollX, -scrollY, -1, 1);
 
 	if(map->canvas.grid || map->scroll.active)
 		drawGrid(map);
@@ -1112,7 +1119,6 @@ static void tick(Map* map)
 
 	map->tic->api.clear(map->tic, TIC_COLOR_BG);
 
-	drawMap(map);
 	drawSheet(map, TIC80_WIDTH - TIC_SPRITESHEET_SIZE - 1, TOOLBAR_SIZE);
 	drawMapToolbar(map, TIC80_WIDTH - 9*TIC_FONT_WIDTH, 1);
 	drawToolbar(map->tic, TIC_COLOR_BG, false);
@@ -1131,9 +1137,14 @@ static void onStudioEvent(Map* map, StudioEvent event)
 	}
 }
 
-static void scanline(tic_mem* tic, s32 row)
+static void overlap(tic_mem* tic, void* data)
 {
-	memcpy(tic->ram.vram.palette.data, row < TOOLBAR_SIZE ? tic->config.palette.data : tic->cart.palette.data, sizeof(tic_palette));
+	Map* map = (Map*)data;
+
+	tic->api.clip(tic, 0, TOOLBAR_SIZE, TIC80_WIDTH - (map->sheet.show ? TIC_SPRITESHEET_SIZE+2 : 0), TIC80_HEIGHT - TOOLBAR_SIZE);
+	drawMapOvr(map);
+	tic->api.clip(tic, 0, 0, TIC80_WIDTH, TIC80_HEIGHT);
+	drawSheetOvr(map, TIC80_WIDTH - TIC_SPRITESHEET_SIZE - 1, TOOLBAR_SIZE);
 }
 
 void initMap(Map* map, tic_mem* tic)
@@ -1176,7 +1187,7 @@ void initMap(Map* map, tic_mem* tic)
 		},
 		.history = history_create(&tic->cart.gfx.map, sizeof tic->cart.gfx.map),
 		.event = onStudioEvent,
-		.scanline = scanline,
+		.overlap = overlap,
 	};
 
 	normalizeMap(&map->scroll.x, &map->scroll.y);
diff --git a/src/map.h b/src/map.h
index 8d11256..fbd6b5f 100644
--- a/src/map.h
+++ b/src/map.h
@@ -80,7 +80,7 @@ struct Map
 
 	void(*tick)(Map*);
 	void(*event)(Map*, StudioEvent);
-	void(*scanline)(tic_mem* tic, s32 row);
+	void(*overlap)(tic_mem* tic, void* data);
 };
 
-void initMap(Map*, tic_mem*);
\ No newline at end of file
+void initMap(Map*, tic_mem*);
diff --git a/src/sprite.c b/src/sprite.c
index fe9b7d1..a5d7656 100644
--- a/src/sprite.c
+++ b/src/sprite.c
@@ -370,6 +370,17 @@ static void drawCanvas(Sprite* sprite, s32 x, s32 y)
 	sprite->tic->api.rect(sprite->tic, x, y, CANVAS_SIZE, CANVAS_SIZE, (tic_color_black));
 	sprite->tic->api.rect(sprite->tic, x-1, y + CANVAS_SIZE+1, CANVAS_SIZE+2, 1, (tic_color_black));
 
+	if(!sprite->editPalette)
+	{
+		if(sprite->mode == SPRITE_DRAW_MODE)
+		{
+			drawBrushSlider(sprite, x - 15, y + 20);
+		}		
+	}
+}
+
+static void drawCanvasOvr(Sprite* sprite, s32 x, s32 y)
+{
 	SDL_Rect rect = getSpriteRect(sprite);
 	s32 r = rect.x + rect.w;
 	s32 b = rect.y + rect.h;
@@ -390,7 +401,6 @@ static void drawCanvas(Sprite* sprite, s32 x, s32 y)
 		switch(sprite->mode)
 		{
 		case SPRITE_DRAW_MODE: 
-			drawBrushSlider(sprite, x - 15, y + 20);
 			processDrawCanvasMouse(sprite, x, y, rect.x, rect.y);
 			break;
 		case SPRITE_PICK_MODE: processPickerCanvasMouse(sprite, x, y, rect.x, rect.y); break;
@@ -521,7 +531,7 @@ static void drawRGBSlider(Sprite* sprite, s32 x, s32 y, u8* value)
 		static const u8 Icon[] =
 		{
 			0b11100000,
-			0b10100000,
+			0b11100000,
 			0b11100000,
 			0b00000000,
 			0b00000000,
@@ -550,7 +560,6 @@ static void drawRGBSlider(Sprite* sprite, s32 x, s32 y, u8* value)
 			s32 offset = x + *value * (Size-1) / Max - 1;
 			drawBitIcon(offset, y, Icon, (tic_color_black));
 			drawBitIcon(offset, y-1, Icon, (tic_color_white));
-			sprite->tic->api.pixel(sprite->tic, offset+1, y, sprite->color);
 		}
 
 		{
@@ -747,6 +756,18 @@ static void drawRGBSliders(Sprite* sprite, s32 x, s32 y)
 	drawRGBTools(sprite, x - 18, y + 26);
 }
 
+static void drawRGBSlidersOvr(Sprite* sprite, s32 x, s32 y)
+{
+	enum{Gap = 6, Count = sizeof(tic_rgb), Size = CANVAS_SIZE, Max = 255};
+
+	u8* data = &sprite->tic->cart.palette.data[sprite->color * Count];
+
+	for(s32 i = 0; i < Count; i++)
+	{
+		sprite->tic->api.pixel(sprite->tic, x + data[i] * (Size-1) / Max, y + Gap*i, sprite->color);
+	}
+}
+
 static void drawPalette(Sprite* sprite, s32 x, s32 y)
 {
 	SDL_Rect rect = {x, y, PALETTE_WIDTH-1, PALETTE_HEIGHT-1};
@@ -774,43 +795,16 @@ static void drawPalette(Sprite* sprite, s32 x, s32 y)
 	}
 
 	sprite->tic->api.rect(sprite->tic, rect.x-1, rect.y-1, rect.w+2, rect.h+2, (tic_color_white));
-
-	for(s32 row = 0, i = 0; row < PALETTE_ROWS; row++)
-		for(s32 col = 0; col < PALETTE_COLS; col++)
-			sprite->tic->api.rect(sprite->tic, x + col * PALETTE_CELL_SIZE, y + row * PALETTE_CELL_SIZE, PALETTE_CELL_SIZE-1, PALETTE_CELL_SIZE-1, i++);
-
 	sprite->tic->api.rect(sprite->tic, rect.x-1, rect.y+rect.h+1, PALETTE_WIDTH+1, 1, (tic_color_black));
 
 	{
 		s32 offsetX = x + (sprite->color % PALETTE_COLS) * PALETTE_CELL_SIZE;
 		s32 offsetY = y + (sprite->color / PALETTE_COLS) * PALETTE_CELL_SIZE;
 
-		sprite->tic->api.rect(sprite->tic, offsetX - 1, offsetY - 1, PALETTE_CELL_SIZE + 1, PALETTE_CELL_SIZE + 1, sprite->color);
-		sprite->tic->api.rect_border(sprite->tic, offsetX - 2, offsetY - 2, PALETTE_CELL_SIZE + 3, PALETTE_CELL_SIZE + 3, (tic_color_white));
-
 		if(offsetY > y)
 			sprite->tic->api.rect(sprite->tic, offsetX - 2, rect.y + rect.h+2, PALETTE_CELL_SIZE+3, 1, (tic_color_black));		
 	}
 
-	{
-		static const u8 Icon[] =
-		{
-			0b00000000,
-			0b00111000,
-			0b01000100,
-			0b01000100,
-			0b01000100,
-			0b00111000,
-			0b00000000,
-			0b00000000,
-		};
-
-		s32 offsetX = x + (sprite->color2 % PALETTE_COLS) * PALETTE_CELL_SIZE;
-		s32 offsetY = y + (sprite->color2 / PALETTE_COLS) * PALETTE_CELL_SIZE;
-
-		drawBitIcon(offsetX, offsetY, Icon, sprite->color2 == (tic_color_white) ? (tic_color_black) : (tic_color_white));
-	}
-
 	{
 		static const u8 Icon[] = 
 		{
@@ -854,6 +848,40 @@ static void drawPalette(Sprite* sprite, s32 x, s32 y)
 	}
 }
 
+static void drawPaletteOvr(Sprite* sprite, s32 x, s32 y)
+{
+	for(s32 row = 0, i = 0; row < PALETTE_ROWS; row++)
+		for(s32 col = 0; col < PALETTE_COLS; col++)
+			sprite->tic->api.rect(sprite->tic, x + col * PALETTE_CELL_SIZE, y + row * PALETTE_CELL_SIZE, PALETTE_CELL_SIZE-1, PALETTE_CELL_SIZE-1, i++);
+
+	{
+		s32 offsetX = x + (sprite->color % PALETTE_COLS) * PALETTE_CELL_SIZE;
+		s32 offsetY = y + (sprite->color / PALETTE_COLS) * PALETTE_CELL_SIZE;
+
+		sprite->tic->api.rect(sprite->tic, offsetX - 1, offsetY - 1, PALETTE_CELL_SIZE + 1, PALETTE_CELL_SIZE + 1, sprite->color);
+		sprite->tic->api.rect_border(sprite->tic, offsetX - 2, offsetY - 2, PALETTE_CELL_SIZE + 3, PALETTE_CELL_SIZE + 3, (tic_color_white));
+	}
+
+	{
+		static const u8 Icon[] =
+		{
+			0b00000000,
+			0b00111000,
+			0b01000100,
+			0b01000100,
+			0b01000100,
+			0b00111000,
+			0b00000000,
+			0b00000000,
+		};
+
+		s32 offsetX = x + (sprite->color2 % PALETTE_COLS) * PALETTE_CELL_SIZE;
+		s32 offsetY = y + (sprite->color2 / PALETTE_COLS) * PALETTE_CELL_SIZE;
+
+		drawBitIcon(offsetX, offsetY, Icon, sprite->color2 == (tic_color_white) ? (tic_color_black) : (tic_color_white));
+	}
+}
+
 static void clearCanvasSelection(Sprite* sprite)
 {
 	SDL_memset(&sprite->select.rect, 0, sizeof(SDL_Rect));
@@ -904,6 +932,11 @@ static void drawSheet(Sprite* sprite, s32 x, s32 y)
 			selectSprite(sprite, getMouseX() - x - offset, getMouseY() - y - offset);
 		}
 	}
+}
+
+static void drawSheetOvr(Sprite* sprite, s32 x, s32 y)
+{
+	SDL_Rect rect = {x, y, TIC_SPRITESHEET_SIZE, TIC_SPRITESHEET_SIZE};
 
 	for(s32 j = 0, index = (sprite->index - sprite->index % TIC_BANK_SPRITES); j < rect.h; j += TIC_SPRITESIZE)
 		for(s32 i = 0; i < rect.w; i += TIC_SPRITESIZE, index++)
@@ -1480,9 +1513,16 @@ static void onStudioEvent(Sprite* sprite, StudioEvent event)
 	}
 }
 
-static void scanline(tic_mem* tic, s32 row)
+static void overlap(tic_mem* tic, void* data)
 {
-	memcpy(tic->ram.vram.palette.data, row < TOOLBAR_SIZE ? tic->config.palette.data : tic->cart.palette.data, sizeof(tic_palette));
+	Sprite* sprite = (Sprite*)data;
+
+	if(sprite->editPalette)
+		drawRGBSlidersOvr(sprite, 24, 91);
+
+	drawCanvasOvr(sprite, 24, 20);
+	drawPaletteOvr(sprite, 24, 112);
+	drawSheetOvr(sprite, TIC80_WIDTH - TIC_SPRITESHEET_SIZE - 1, 7);
 }
 
 void initSprite(Sprite* sprite, tic_mem* tic)
@@ -1513,6 +1553,6 @@ void initSprite(Sprite* sprite, tic_mem* tic)
 		.mode = SPRITE_DRAW_MODE,
 		.history = history_create(tic->cart.gfx.tiles, TIC_SPRITES * sizeof(tic_tile)),
 		.event = onStudioEvent,
-		.scanline = scanline,
+		.overlap = overlap,
 	};
 }
\ No newline at end of file
diff --git a/src/sprite.h b/src/sprite.h
index f12bba5..a147108 100644
--- a/src/sprite.h
+++ b/src/sprite.h
@@ -61,7 +61,7 @@ struct Sprite
 
 	void (*tick)(Sprite*);
 	void (*event)(Sprite*, StudioEvent);
-	void (*scanline)(tic_mem* tic, s32 row);
+	void (*overlap)(tic_mem* tic, void* data);
 };
 
 void initSprite(Sprite*, tic_mem*);
\ No newline at end of file
diff --git a/src/studio.c b/src/studio.c
index 86699ff..492013a 100644
--- a/src/studio.c
+++ b/src/studio.c
@@ -57,6 +57,8 @@
 #define OFFSET_LEFT ((TIC80_FULLWIDTH-TIC80_WIDTH)/2)
 #define OFFSET_TOP ((TIC80_FULLHEIGHT-TIC80_HEIGHT)/2)
 
+#define POPUP_DUR (TIC_FRAMERATE*2)
+
 typedef struct
 {
 	u8 data[16];
@@ -670,7 +672,7 @@ const u8* getKeyboard()
 
 static void showPopupMessage(const char* text)
 {
-	studio.popup.counter = TIC_FRAMERATE * 2;
+	studio.popup.counter = POPUP_DUR;
 	strcpy(studio.popup.message, text);
 }
 
@@ -1425,7 +1427,7 @@ static void setCoverImage()
 	{
 		enum {Pitch = TIC80_FULLWIDTH*sizeof(u32)};
 
-		tic->api.blit(tic, tic->api.scanline, tic->api.overlap);
+		tic->api.blit(tic, tic->api.scanline, tic->api.overlap, NULL);
 
 		u32* buffer = SDL_malloc(TIC80_WIDTH * TIC80_HEIGHT * sizeof(u32));
 
@@ -1912,6 +1914,7 @@ static void blitTexture()
 
 	tic_scanline scanline = NULL;
 	tic_overlap overlap = NULL;
+	void* data = NULL;
 
 	switch(studio.mode)
 	{
@@ -1920,16 +1923,18 @@ static void blitTexture()
 		overlap = tic->api.overlap;
 		break;
 	case TIC_SPRITE_MODE:
-		scanline = studio.sprite.scanline;
+		overlap = studio.sprite.overlap;
+		data = &studio.sprite;
 		break;
 	case TIC_MAP_MODE:
-		scanline = studio.map.scanline;
+		overlap = studio.map.overlap;
+		data = &studio.map;
 		break;
 	default:
 		break;
 	}
 
-	tic->api.blit(tic, scanline, overlap);
+	tic->api.blit(tic, scanline, overlap, data);
 	SDL_memcpy(pixels, tic->screen, sizeof tic->screen);
 
 	recordFrame(pixels);
@@ -2052,6 +2057,28 @@ static void useSystemPalette()
 	memcpy(studio.tic->ram.vram.palette.data, studio.tic->config.palette.data, sizeof(tic_palette));
 }
 
+static void drawPopup()
+{
+	if(studio.popup.counter > 0)
+	{
+		studio.popup.counter--;
+
+		s32 anim = 0;
+
+		enum{Dur = TIC_FRAMERATE/2};
+
+		if(studio.popup.counter < Dur)
+			anim = -((Dur - studio.popup.counter) * (TIC_FONT_HEIGHT+1) / Dur);
+		else if(studio.popup.counter >= (POPUP_DUR - Dur))
+			anim = (((POPUP_DUR - Dur) - studio.popup.counter) * (TIC_FONT_HEIGHT+1) / Dur);
+
+		studio.tic->api.rect(studio.tic, 0, anim, TIC80_WIDTH, TIC_FONT_HEIGHT+1, (tic_color_red));
+		studio.tic->api.text(studio.tic, studio.popup.message, 
+			(s32)(TIC80_WIDTH - strlen(studio.popup.message)*TIC_FONT_WIDTH)/2,
+			anim + 1, (tic_color_white));
+	}
+}
+
 static void renderStudio()
 {
 	tic_mem* tic = studio.tic;
@@ -2102,14 +2129,7 @@ static void renderStudio()
 	default: break;
 	}
 
-	if(studio.popup.counter > 0)
-	{
-		studio.popup.counter--;
-
-		studio.tic->api.rect(studio.tic, 0, TIC80_HEIGHT - TIC_FONT_HEIGHT - 1, TIC80_WIDTH, TIC80_HEIGHT, (tic_color_red));
-		studio.tic->api.text(studio.tic, studio.popup.message, (s32)(TIC80_WIDTH - strlen(studio.popup.message)*TIC_FONT_WIDTH)/2,
-			TIC80_HEIGHT - TIC_FONT_HEIGHT, (tic_color_white));
-	}
+	drawPopup();
 
 	if(getConfig()->noSound)
 		SDL_memset(tic->ram.registers, 0, sizeof tic->ram.registers);
diff --git a/src/tic.c b/src/tic.c
index 85b95fa..c6bb8a2 100644
--- a/src/tic.c
+++ b/src/tic.c
@@ -1510,20 +1510,20 @@ static void api_tick(tic_mem* memory, tic_tick_data* data)
 		: callLuaTick(machine);
 }
 
-static void api_scanline(tic_mem* memory, s32 row)
+static void api_scanline(tic_mem* memory, s32 row, void* data)
 {
 	tic_machine* machine = (tic_machine*)memory;
 
 	if(machine->state.initialized)
-		machine->state.scanline(memory, row);
+		machine->state.scanline(memory, row, data);
 }
 
-static void api_overlap(tic_mem* memory)
+static void api_overlap(tic_mem* memory, void* data)
 {
 	tic_machine* machine = (tic_machine*)memory;
 
 	if(machine->state.initialized)
-		machine->state.ovr.callback(memory);
+		machine->state.ovr.callback(memory, data);
 }
 
 static double api_time(tic_mem* memory)
@@ -1704,13 +1704,13 @@ static inline void memset4(void *dst, u32 val, u32 dwords)
 #endif
 }
 
-static void api_blit(tic_mem* tic, tic_scanline scanline, tic_overlap overlap)
+static void api_blit(tic_mem* tic, tic_scanline scanline, tic_overlap overlap, void* data)
 {
 	const u32* pal = tic_palette_blit(&tic->ram.vram.palette);
 
 	if(scanline)
 	{
-		scanline(tic, 0);
+		scanline(tic, 0, data);
 		pal = tic_palette_blit(&tic->ram.vram.palette);
 	}
 
@@ -1740,7 +1740,7 @@ static void api_blit(tic_mem* tic, tic_scanline scanline, tic_overlap overlap)
 			
 		if(scanline && (r < TIC80_HEIGHT-1))
 		{
-			scanline(tic, r+1);
+			scanline(tic, r+1, data);
 			pal = tic_palette_blit(&tic->ram.vram.palette);
 		}
 	}
@@ -1748,7 +1748,7 @@ static void api_blit(tic_mem* tic, tic_scanline scanline, tic_overlap overlap)
 	memset4(&out[(TIC80_FULLHEIGHT-Bottom) * TIC80_FULLWIDTH], pal[tic->ram.vram.vars.border], TIC80_FULLWIDTH*Bottom);
 
 	if(overlap)
-		overlap(tic);
+		overlap(tic, data);
 }
 
 static void initApi(tic_api* api)
diff --git a/src/tic80.c b/src/tic80.c
index d340b6a..64a97ec 100644
--- a/src/tic80.c
+++ b/src/tic80.c
@@ -123,7 +123,7 @@ TIC80_API void tic80_tick(tic80* tic, tic80_input input)
 	tic80->memory->api.tick(tic80->memory, &tic80->tickData);
 	tic80->memory->api.tick_end(tic80->memory);
 
-	tic80->memory->api.blit(tic80->memory, tic80->memory->api.scanline, tic80->memory->api.overlap);
+	tic80->memory->api.blit(tic80->memory, tic80->memory->api.scanline, tic80->memory->api.overlap, NULL);
 
 	TickCounter++;
 }
diff --git a/src/ticapi.h b/src/ticapi.h
index 2159339..144cc62 100644
--- a/src/ticapi.h
+++ b/src/ticapi.h
@@ -62,8 +62,8 @@ typedef struct
 } tic_tick_data;
 
 typedef struct tic_mem tic_mem;
-typedef void(*tic_scanline)(tic_mem* memory, s32 row);
-typedef void(*tic_overlap)(tic_mem* memory);
+typedef void(*tic_scanline)(tic_mem* memory, s32 row, void* data);
+typedef void(*tic_overlap)(tic_mem* memory, void* data);
 
 typedef struct
 {
@@ -96,8 +96,8 @@ typedef struct
 	void (*music_frame)			(tic_mem* memory, s32 track, s32 frame, s32 row, bool loop);
 	double (*time)				(tic_mem* memory);
 	void (*tick)				(tic_mem* memory, tic_tick_data* data);
-	void (*scanline)			(tic_mem* memory, s32 row);
-	void (*overlap)				(tic_mem* memory);
+	void (*scanline)			(tic_mem* memory, s32 row, void* data);
+	void (*overlap)				(tic_mem* memory, void* data);
 	void (*reset)				(tic_mem* memory);
 	void (*pause)				(tic_mem* memory);
 	void (*resume)				(tic_mem* memory);
@@ -109,7 +109,7 @@ typedef struct
 
 	void (*tick_start)			(tic_mem* memory, const tic_sound* src);
 	void (*tick_end)			(tic_mem* memory);
-	void (*blit)				(tic_mem* tic, tic_scanline scanline, tic_overlap overlap);
+	void (*blit)				(tic_mem* tic, tic_scanline scanline, tic_overlap overlap, void* data);
 
 	tic_script_lang (*get_script)(tic_mem* memory);
 } tic_api;