float3 rTex = tex2D(RTextureSampler, input.UV * TextureTiling);
float3 gTex = tex2D(GTextureSampler, input.UV * TextureTiling);
float3 bTex = tex2D(BTextureSampler, input.UV * TextureTiling);
float3 base = tex2D(BaseTextureSampler, input.UV * TextureTiling);

float3 weightMap = tex2D(WeightMapSampler, input.UV);

float3 output = clamp(1.0f - weightMap.r - weightMap.g - weightMap.b, 0, 1) * base + weightMap.r * rTex + weightMap.g * gTex + weightMap.b * bTex;