Render step that makes the passed in render source block emissives
Copies an appearance vis render_target and render_source on to the emissive blocking plane. This means that the atom in question will block any emissive sprites. This should only be used internally. If you are directly creating more of these, you're almost guaranteed to be doing something wrong.
Render step that modfies an atom's color Useful for creating coherent emissive blockers out of things like glass floors by lowering alpha statically using matrixes Other stuff too I'm sure