added Dither effect

scenes/main_render.gdshader

@@ -5,7 +5,9 @@ uniform int sample_count:hint_range(1, 20) = 1;
 
 uniform float color_steps:hint_range(1.0, 255.0, 1.0);
 uniform sampler2D color_curve;
+uniform bool dither = false;
 
+const mat4 bayer = (mat4(vec4(0,8,2,10),vec4(12,4,14,6),vec4(3,11,1,9),vec4(15,7,13,5)) -8.) / 16.;
 
 void vertex() {
 	// Called for every vertex the material is visible on.
@@ -41,12 +43,20 @@ void fragment() {
 		texture(color_curve,vec2(fullColor.g,0)).g,
 		texture(color_curve,vec2(fullColor.b,0)).b);
 	vec3 scaledColor = strechedColor * color_steps;
+	
+	if(dither){
+		ivec2 bayerIndex = ivec2(int(mod(float(intUv.x),4.)),int(mod(float(intUv.y),4.)));
+		float bayerValue = bayer[bayerIndex.x][bayerIndex.y];
+		scaledColor+=bayerValue;
+	}
+	
 	vec3 roundColor = round(scaledColor);
 	vec3 backScaledColor = roundColor / color_steps;
 	COLOR = vec4(backScaledColor,1);
 	//COLOR = vec4(flooredUv,0,1);
 	//COLOR = vec4(vec3(float(textureQueryLevels(TEXTURE)/1)),1);
 	//COLOR = vec4(1,0,0,1);
+	//COLOR = vec4(bayerValue,0,0,1);
 }
 
 //void light() {