linkoboy, the wpc_*.sub is the "guy" used to create de dialog interface that can allow the user to play with parameters like flip X or Y colours. Take a look at one of those 3d shaders file and you can add that.
I can do that late if you think it's complicated to understand, but I have a guess that you can do it.
I can do that late if you think it's complicated to understand, but I have a guess that you can do it.