It looks really cheap, you could easily hue shift every pixel in the game with this. One trick I've used in the past is using the alpha channel to mask multipl

It looks really cheap, you could easily hue shift every pixel in the game with this. One trick I've used in the past is using the alpha channel to mask multiple hue shifts in a shader to give a lot of variations. Eg 0 = shift A, 0.5 = don't shift, 1 = shift B. That way you can make eg leather armor with metal attachments, and tan or fade the leather and swap metal types independently.