Implements #189 using density to estimate radius

Still need to adjust attrib contributions by surface normal relation to camera direction

components/renderers/cpp/src/splatter.cu

@@ -392,7 +392,7 @@ __global__ void dibr_attribute_contrib_kernel(
     const float d = (float)depth_in.tex2D((int)screenPos.x, (int)screenPos.y) / 1000.0f;
 
 	const A input = generateInput(in.tex2D(x, y), params, worldPos);
-	const float weight = ftl::cuda::weighting(fabs(camPos.z - d), 0.002f);
+	const float weight = ftl::cuda::weighting(fabs(camPos.z - d), 0.02f);
 	const B weighted = make<B>(input) * weight; //weightInput(input, weight);
 
 	if (weight > 0.0f) {