{
	parms {
	}
	state {
		depthfunc	GL_ALWAYS
		alphamask
		depthmask
		twosided
	}
	hlsl_vp {
		result.position = vertex.position;
	}
	hlsl_fp {
		float2 texCoord = screenPosToTexcoord( fragment.position.xy, $renderPositionToViewTexture );

		// Fetch the depth.
		float depth = tex2Ddepth_fast( $lightDepthMap, texCoord );

		// Compute partial derivatives of depth.
		float dx = ddx( depth );
		float dy = ddy( depth );

		float moment1 = depth;
		float moment2 = depth * depth;

		float s = $renderPositionToViewTexture.z;

		float d0 = tex2Ddepth_fast( $lightDepthMap, texCoord + s * 2.0 * float2( -0.375, -0.125 ) );
		float d1 = tex2Ddepth_fast( $lightDepthMap, texCoord + s * 2.0 * float2( -0.125,  0.375 ) );
		float d2 = tex2Ddepth_fast( $lightDepthMap, texCoord + s * 2.0 * float2(  0.125, -0.375 ) );
		float d3 = tex2Ddepth_fast( $lightDepthMap, texCoord + s * 2.0 * float2(  0.375,  0.125 ) );

		float d4 = tex2Ddepth_fast( $lightDepthMap, texCoord + s * 2.5 * float2( -0.125, -0.375 ) );
		float d5 = tex2Ddepth_fast( $lightDepthMap, texCoord + s * 2.5 * float2(  0.375, -0.125 ) );
		float d6 = tex2Ddepth_fast( $lightDepthMap, texCoord + s * 2.5 * float2( -0.375,  0.125 ) );
		float d7 = tex2Ddepth_fast( $lightDepthMap, texCoord + s * 2.5 * float2(  0.125,  0.375 ) );

		moment1 = ( moment1 * 0.5 ) + ( d0 + d1 + d2 + d3 ) * 0.25 * 0.25 + ( d4 + d5 + d6 + d7 ) * 0.25 * 0.25;
		moment2 = ( moment2 * 0.5 ) + ( d0 * d0 + d1 * d1 + d2 * d2 + d3 * d3 ) * 0.25 * 0.25 + ( d4 * d4 + d5 * d5 + d6 * d6 + d7 * d7 ) * 0.25 * 0.25;

		result.color.x = moment1;
		result.color.y = moment2 + 100 * ( dx * dx + dy * dy );
		result.color.z = 0.0;
		result.color.a = 1.0;
	}
}