For over 2 years I've been using the additive blend mode daily for almost everything I do. It's ability to brighten colors and use blacks as a mask has proved mighty useful. I now have a need for the complete opposite. In most graphics software there's a blend mode called multiply that darkens colors and leave whites invisible. I need this for a specific case in my game, but the current blend modes aren't giving me much luck.
Any recommendations on how to achieve this effect in C2?