void ShowNormals_fp
(
    in float4 position : POSITION,
    in float2 iTexCoord : TEXCOORD0,
    
    out float4 oColor0: COLOR0,
    
    uniform sampler mrt1: register(s0)
)
{
    oColor0 = float4(tex2D(mrt1, iTexCoord).xyz / 2 + 0.5, 1);
}