// For each sample, sum up each sample's color in "Blurred" and then divide
    // to average the color after all the samples are added.
    float3 Blurred = 0;
    for(float i = 0; i < NumberOfPostProcessSamples; i++)
    {
        // Sample texture in a new spot based on pixelVelocity vector
        // and average it with the other samples
        float2 lookup = pixelVelocity * i / NumberOfPostProcessSamples + OriginalUV;

        // Lookup the color at this new spot
        float4 Current = tex2D(RenderTargetSampler, lookup);

        // Add it with the other samples
        Blurred += Current.rgb;
    }