diff --git a/include/gfx/gfx.h b/include/gfx/gfx.h
index 0ca3260..62450aa 100644
--- a/include/gfx/gfx.h
+++ b/include/gfx/gfx.h
@@ -114,6 +114,7 @@ void gfx_blend(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w
 void gfx_blend_amap(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h);
 void gfx_blend_amap_color(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h, int r, int g, int b);
 void gfx_blend_amap_alpha(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h, int a);
+void gfx_blend_add_satur(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h);
 void gfx_blend_src_bright(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h, int a, int rate);
 void gfx_blend_amap_color_alpha(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h, int r, int g, int b, int a);
 void gfx_fill(struct texture *dst, int x, int y, int w, int h, int r, int g, int b);
diff --git a/src/draw.c b/src/draw.c
index 805158c..9eba807 100644
--- a/src/draw.c
+++ b/src/draw.c
@@ -360,6 +360,16 @@ void gfx_blend_src_bright(Texture *dst, int dx, int dy, Texture *src, int sx, in
 	restore_blend_mode();
 }
 
+void gfx_blend_add_satur(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h)
+{
+	glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE, GL_ZERO, GL_ONE);
+
+	struct copy_data data = COPY_DATA(dx, dy, sx, sy, w, h);
+	run_copy_shader(&copy_shader.s, dst, src, &data);
+
+	restore_blend_mode();
+}
+
 void gfx_blend_amap_color_alpha(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h, int r, int g, int b, int a)
 {
 	glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_DST_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
diff --git a/src/hll/DrawGraph.c b/src/hll/DrawGraph.c
index bea93ac..d8fe50f 100644
--- a/src/hll/DrawGraph.c
+++ b/src/hll/DrawGraph.c
@@ -211,7 +211,11 @@ void DrawGraph_BlendSrcBright(int dst, int dx, int dy, int src, int sx, int sy,
 	gfx_blend_src_bright(DTEX(dst), dx, dy, STEX(src), sx, sy, w, h, alpha, rate);
 }
 
-//void DrawGraph_BlendAddSatur(int dst, int dx, int dy, int src, int sx, int sy, int w, int h);
+void DrawGraph_BlendAddSatur(int dst, int dx, int dy, int src, int sx, int sy, int w, int h)
+{
+	gfx_blend_add_satur(DTEX(dst), dx, dy, STEX(src), sx, sy, w, h);
+}
+
 //void DrawGraph_BlendAMapSrcOnly(int dst, int dx, int dy, int src, int sx, int sy, int w, int h);
 
 void DrawGraph_BlendAMapColorAlpha(int dst, int dx, int dy, int src, int sx, int sy, int w, int h, int r, int g, int b, int a)
@@ -351,7 +355,7 @@ HLL_LIBRARY(DrawGraph,
 	    HLL_EXPORT(CopyAMapMin, DrawGraph_CopyAMapMin),
 	    HLL_EXPORT(Blend, DrawGraph_Blend),
 	    HLL_EXPORT(BlendSrcBright, DrawGraph_BlendSrcBright),
-	    //HLL_EXPORT(BlendAddSatur, DrawGraph_BlendAddSatur),
+	    HLL_EXPORT(BlendAddSatur, DrawGraph_BlendAddSatur),
 	    HLL_EXPORT(BlendAMap, DrawGraph_BlendAMap),
 	    //HLL_EXPORT(BlendAMapSrcOnly, DrawGraph_BlendAMapSrcOnly),
 	    HLL_EXPORT(BlendAMapColor, DrawGraph_BlendAMapColor),