The above screenshot is from one of Deepnight's games, Delicious Cortex.  I've attached it to show the effect I'm trying to achieve. I've figured out how to properly scale my game to 3x with crisp rendering, and how to apply a filter to the whole game world. I've hit a snag with the filter step though; Sebastian applies a 3px by 3px mosaic grid in overlay mode to a game that's scaled 3x. When I apply a shader to the game world it's being rendered before its scaled (as expected), but the eff