Well guess what, turns out that according to vbexplorer, Blt takes into account both palettes while blitting and optimizes the colors! So that means that if both my surfaces are 8-bit, I can attach a new palette to my sprites and blit! So I don't need to learn how to use BltFx to blit between pixel formats after all! HOWEVER, I would still like to know HOW to blit between pixel formats, because I want to be able to have the most color-depth possible I don't want to have to reserve such and such amount of colors for terrain, and such and such colors for units, and such and such for the hud, and such and such as constants, AARRGG its just too much work, and I STILL lose color depth. THATS why I want to learn how to blit between pixel formats. IF SOMEBODY KNOWS HOW, SAY IT!!!