Made a Gui and created a dropdown menu to select block

Collector/Content/themes/editor/effects/disabled.fx

@@ -0,0 +1,38 @@
+#if OPENGL
+	#define SV_POSITION POSITION
+	#define VS_SHADERMODEL vs_3_0
+	#define PS_SHADERMODEL ps_3_0
+#else
+	#define VS_SHADERMODEL vs_4_0_level_9_1
+	#define PS_SHADERMODEL ps_4_0_level_9_1
+#endif
+
+Texture2D SpriteTexture;
+
+sampler2D SpriteTextureSampler = sampler_state
+{
+	Texture = <SpriteTexture>;
+};
+
+struct VertexShaderOutput
+{
+	float4 Position : SV_POSITION;
+	float4 Color : COLOR0;
+	float2 TextureCoordinates : TEXCOORD0;
+};
+
+float4 MainPS(VertexShaderOutput input) : COLOR
+{
+	float4 color = tex2D(SpriteTextureSampler,input.TextureCoordinates) * input.Color;
+	float value = (color.r + color.g + color.b) / 3;
+	color.r = color.g = color.b = value;
+	return color;
+}
+
+technique SpriteDrawing
+{
+	pass P0
+	{
+		PixelShader = compile PS_SHADERMODEL MainPS();
+	}
+};