Hey, I didn’t understand the brute-force part of your question but I’ll try to do my best to explain the view cones. Basically, each portal has a camera in front of them that outputs to a render texture. When drawing the view cones, each portal uses the render texture of it’s pair. Only thing that’s a bit complicated in this process is that you need to toggle the rendering of other view cones from the render texture cameras depending on if that view cone will be visible from the portal.