// quantize into steps 
  float time=0;
  float sampleDist = 1.0f/512.0f;  // distance one pixel in u/v
  
  sampler2D image : register(s0);
  
  
  
  
  
  float4 main(
  	float4 Pos : POSITION,
  	float2 texCoord: TEXCOORD0) : COLOR 
  {
  	float4 img = tex2D(image, texCoord);
  	
  	//float quant=floor(20*time);
  	float quant=5;
  	
    	img  = floor(img*quant+0.9)/quant;
    	
    	return img;
  
  }