hmm, I already told him what to do on my second post in a concise manner, oh well. I guess having it said different ways can only help :-) except for the BlitzMax advice haha.
DrDerekDoctors: If it sets the pixels to white, make your mask colour 255,255,255. Better still switch off the transparency and just fill your background with a colour that's not in use in the main graphic (such as magenta 255,0,255) and set this to the mask colour in your game. It's what I do (did) in BlitzPlus.
DrDerekDoctors: If it sets the pixels to white, make your mask colour 255,255,255. Better still switch off the transparency and just fill your background with a colour that's not in use in the main graphic (such as magenta 255,0,255) and set this to the mask colour in your game. It's what I do (did) in BlitzPlus.