The problem is that compositors typically don't have the notion of 3D scene.
It's all just a stack of layers, one window per layer. There is no shadow to speak of, only a mask around the window that provides the illusion of shadow. So there is no real interaction between all those items, no source of light, no distance, and no way to do ray tracing or some other techniques.
johncoltrane•46m ago
It's all just a stack of layers, one window per layer. There is no shadow to speak of, only a mask around the window that provides the illusion of shadow. So there is no real interaction between all those items, no source of light, no distance, and no way to do ray tracing or some other techniques.