diff --git a/src/ags.c b/src/ags.c
index 36e75d5..fc32ea0 100644
--- a/src/ags.c
+++ b/src/ags.c
@@ -384,11 +384,17 @@ agsurface_t *ags_drawStringToSurface(const char *str) {
 	return &result;
 }
 
-void ags_drawCg(cgdata *cg, int x, int y, int brightness) {
+void ags_drawCg(cgdata *cg, int x, int y, int brightness, int sprite_color, bool alpha_blend) {
 	switch (cg->depth) {
-	case 8:  sdl_drawImage8_fromData(cg, x, y); break;
-	case 16: sdl_drawImage16_fromData(cg, x, y, brightness); break;
-	case 24: sdl_drawImage24_fromData(cg, x, y, brightness); break;
+	case 8:
+		sdl_drawImage8_fromData(cg, x, y, sprite_color);
+		break;
+	case 16:
+		sdl_drawImage16_fromData(cg, x, y, brightness, alpha_blend);
+		break;
+	case 24:
+		sdl_drawImage24_fromData(cg, x, y, brightness);
+		break;
 	}
 }
 
diff --git a/src/ags.h b/src/ags.h
index e1d0a70..1ddfad3 100644
--- a/src/ags.h
+++ b/src/ags.h
@@ -170,7 +170,7 @@ extern void ags_copyRegion(void *region, int sx, int sy, int w,int h,int dx,int
 extern void ags_delRegion(void *region);
 
 extern MyRectangle ags_drawString(int x, int y, const char *src, int col);
-extern void ags_drawCg(cgdata *cg, int x, int y, int brightness);
+extern void ags_drawCg(cgdata *cg, int x, int y, int brightness, int sprite_color, bool alpha_blend);
 
 extern void ags_copyArea_shadow(int sx, int sy, int w, int h, int dx, int dy);
 extern void ags_copyArea_transparent(int sx, int sy, int w, int h, int dx, int dy, int col);
diff --git a/src/cg.c b/src/cg.c
index 99b4ffa..e4f61dc 100644
--- a/src/cg.c
+++ b/src/cg.c
@@ -65,7 +65,7 @@ static CG_TYPE check_cgformat(BYTE *data);
 static void set_vspbank(BYTE *pic, int bank, int width, int height);
 static MyPoint set_display_loc(cgdata *cg);
 static void clear_display_loc();
-static void display_cg(cgdata *cg, int x, int y);
+static void display_cg(cgdata *cg, int x, int y, int sprite_color, bool alpha_blend);
 static cgdata *loader(int no);
 
 
@@ -176,8 +176,8 @@ static void clear_display_loc() {
  *  x : display location x
  *  y : display location y
 */ 
-static void display_cg(cgdata *cg, int x, int y) {
-	ags_drawCg(cg, x, y, cg_brightness);
+static void display_cg(cgdata *cg, int x, int y, int sprite_color, bool alpha_blend) {
+	ags_drawCg(cg, x, y, cg_brightness, sprite_color, alpha_blend);
 	ags_updateArea(x, y, cg->width, cg->height);
 }
 
@@ -340,8 +340,7 @@ void cg_load(int no, int flg) {
 			ags_alpha_setPixel(p.x, p.y, cg->width, cg->height, cg->alpha);
 		}
 		/* draw cg pixel */
-		cg->spritecolor = flg;
-		display_cg(cg, p.x, p.y);
+		display_cg(cg, p.x, p.y, flg, flg != -1);
 		/* clear display offset */
 		clear_display_loc();
 	}
@@ -380,7 +379,7 @@ void cg_load_with_alpha(int cgno, int shadowno) {
 	/* draw pixel */
 	if (cg) {
 		p = set_display_loc(cg);
-		display_cg(cg, p.x, p.y);
+		display_cg(cg, p.x, p.y, -1, true);
 	}
 	
 	/* clear display offset */
@@ -436,8 +435,7 @@ int cg_load_with_filename(char *fname_utf8, int x, int y) {
 		/* set display offset */
 		p = set_display_loc(cg);
 		/* draw cg pixel */
-		cg->spritecolor = -1;
-		display_cg(cg, p.x, p.y);
+		display_cg(cg, p.x, p.y, -1, false);
 		/* clear display offset */
 		clear_display_loc();
 	}
diff --git a/src/cg.h b/src/cg.h
index 1ce0c54..c10ec33 100644
--- a/src/cg.h
+++ b/src/cg.h
@@ -59,8 +59,6 @@ typedef struct {
 	
 	int vsp_bank;    // palette bank for vsp
 	int pms_bank;    // palette bank for pms
-	
-	int spritecolor; // sprite color for vsp and pms8
 } cgdata;
 
 /*
diff --git a/src/sdl_core.h b/src/sdl_core.h
index 16e937d..395329e 100644
--- a/src/sdl_core.h
+++ b/src/sdl_core.h
@@ -67,8 +67,8 @@ extern void sdl_copyArea(int sx,int sy, int w, int h, int dx, int dy);
 extern void sdl_copyAreaSP(int sx, int sy, int w, int h, int dx, int dy, BYTE sp);
 extern void sdl_wrapColor(int sx, int sy, int w, int h, BYTE cl, int rate);
 extern void sdl_scaledCopyArea(int sx, int sy, int sw, int sh, int dx, int dy, int dw, int dh, int mirror);
-extern void sdl_drawImage8_fromData(cgdata *cg, int x, int y);
-extern void sdl_drawImage16_fromData(cgdata *cg, int x, int y, int brightness);
+extern void sdl_drawImage8_fromData(cgdata *cg, int x, int y, int sprite_color);
+extern void sdl_drawImage16_fromData(cgdata *cg, int x, int y, int brightness, bool alpha_blend);
 extern void sdl_drawImage24_fromData(cgdata *cg, int x, int y, int brightness);
 extern void sdl_copyAreaSP16_shadow(int sx, int sy, int w, int h, int dx, int dy, int lv);
 extern void sdl_copyAreaSP16_alphaBlend(int sx, int sy, int w, int h, int dx, int dy, int lv);
diff --git a/src/sdl_draw.c b/src/sdl_draw.c
index 7629ecf..97a9714 100644
--- a/src/sdl_draw.c
+++ b/src/sdl_draw.c
@@ -206,7 +206,7 @@ void sdl_copyAreaSP(int sx, int sy, int w, int h, int dx, int dy, BYTE sp) {
 	SDL_SetColorKey(sdl_dib, SDL_FALSE, 0);
 }
 
-void sdl_drawImage8_fromData(cgdata *cg, int dx, int dy) {
+void sdl_drawImage8_fromData(cgdata *cg, int dx, int dy, int sprite_color) {
 	int w = cg->width;
 	int h = cg->height;
 	SDL_Surface *s = SDL_CreateRGBSurfaceWithFormatFrom(
@@ -234,9 +234,8 @@ void sdl_drawImage8_fromData(cgdata *cg, int dx, int dy) {
 		memcpy(s->format->palette->colors, sdl_col, sizeof(SDL_Color) * 256);
 	}
 	
-	if (cg->spritecolor != -1) {
-		SDL_SetColorKey(s, SDL_TRUE, cg->spritecolor);
-	}
+	if (sprite_color != -1)
+		SDL_SetColorKey(s, SDL_TRUE, sprite_color);
 	
 	SDL_Rect r_dst = {dx, dy, w, h};
 	
diff --git a/src/sdl_image.c b/src/sdl_image.c
index 7483d73..3046801 100644
--- a/src/sdl_image.c
+++ b/src/sdl_image.c
@@ -142,12 +142,12 @@ void sdl_scaledCopyArea(int sx, int sy, int sw, int sh, int dx, int dy, int dw,
 /*
  * dibに16bitCGの描画
  */
-void sdl_drawImage16_fromData(cgdata *cg, int dx, int dy, int brightness) {
+void sdl_drawImage16_fromData(cgdata *cg, int dx, int dy, int brightness, bool alpha_blend) {
 	int w = cg->width;
 	int h = cg->height;
 
 	SDL_Surface *s;
-	if (cg->alpha != NULL && cg->spritecolor != -1) {
+	if (cg->alpha && alpha_blend) {
 		unsigned short *p_src = (WORD *)cg->pic;
 		DWORD *p_ds, *p_dst;
 		BYTE *a_src = cg->alpha;