修复hold块不可用时显示没有变

parts/shaders/blockSatur.glsl

@@ -2,9 +2,9 @@ extern float k,b;
 vec4 effect(vec4 color,Image tex,vec2 tex_coords,vec2 scr_coords){
 	vec4 texcolor=Texel(tex,tex_coords);
 	return vec4(
-		b+texcolor.r*k,
-		b+texcolor.g*k,
-		b+texcolor.b*k,
+		(b+texcolor.r*k)*color.r,
+		(b+texcolor.g*k)*color.g,
+		(b+texcolor.b*k)*color.b,
 		texcolor.a*color.a
 	);
 }