Transparent Textures

Hi ArnoI think you could be rightI was told to use either, 0,0,0 or 0,255,0 in my texture file which FS would reconize as transparent, which I guess is correct I think I'm confused about Alpha and masksI created a alpha channel in DXTBmp, and edited in psp (via Dxt) and selected various levels of grey on the windows (Black part of mask), which worked, but couldn't understand where a different colour could come from. Does it come from the Texture File instead of 0,0,0 or 0,255,0 colours.Am I using the right Conversion program, DXTBmp, BMP2000 and Image Tool, Which?Think I need a idiots guideThanks for your continue help, is the present method expensive on frame rates?Dave