Right now I'm trying to see if I can completely redo the original construct 0.x ghost shooter demo. I've run into a problem though with lights. My plan was to use a semi-transparent black sheet to simulate the darkness, then use one of the effects to eat out part of it when an object gives off light. So far however any time I've tried to use an effect if would just react with everything meaning the light would eat through the darkness, the ghosts, the player, and the floor. Any advice?