Hey, ive just recoreded some footage in a blueroom and have succesfully managed(well kind of) to key out most of the blue. iv just had an idea where i want to invert what ive just done so that it creates a mask around the people ive recorded, so i can put video behind them. i know you can invert the selection but this leaves the blue of the blue room, i just want it to be black, like a mask. ive been trying for ages but cant seem to come up with a solution. anyone know what im talking about? Cheers fellas.