TGA source graphics increase the options available to skin developers.

Per pixel alpha blending is supported in most 'standard' objects (i.e. if there is a .wbd file).

To use TGA source files just refer to the TAG file instead of the .bmp file as you normally would. You must use 32bit, uncompressed TGA's.

You should also add PerPixel=1 and Trans=1 to the appropriate section of the .uis file too (and wipe the .wbd's before you reload the skin).

Per pixel alpha transparency is only supported by Windows 2000 and XP, but the TGA's will load and work on 98/ME.

In recent builds, the XPPlatinum skin included uses a sample button.tga.