by Travis » Sun Apr 02, 2006 8:02 pm
Well, when working with a repaint, or something that uses DXT3, its customary to use whatever the file was originally saved in. This prevents conflicts with whatever you are repainting.
As for which one is BETTER: *.bmp (on its own) is just a regular image. But DXT3, when added to a *.bmp file and compressed, can add reflection (or opacity, depending on the model). Choosing between them is often merely a matter of what you like: reflections or not.