{
	parms {
		stageSort	sortCoverage
	}
	hlsl_vp {
		// Convert back from 16 bit vertex elements.
		float4 position = vertex.position * $vertexXYZScale + $vertexXYZBias;

		result.position.x = dot4( position, $mvpMatrixX );
		result.position.y = dot4( position, $mvpMatrixY );
		result.position.z = dot4( position, $mvpMatrixZ );
		result.position.w = dot4( position, $mvpMatrixW );
	}
	hlsl_fp {
		// calculations in eye space
		float3 pos;
		pos.z = 1.0 / fragment.position.w;
		pos.xy = pos.z * ( 2.0 * screenPosToTexcoord( fragment.position.xy, $positionToViewTexture ) - 1.0 );
		float3 normal = -normalize( cross( ddx( pos ), ddy( pos ) ) );

		// light is above and to the right in the eye plane
		float3 L = normalize( float3( 1.0, 1.0, 0.0 ) - pos );

		result.color0.xyz = _float3( dot3( normal, L ) * 0.75 );
		result.color0.w = 1.0;
		result.color1 = _float4( 0.0 );
	}
}