I trying to make the windsheild and rear window on the Cup90 cars darker. I converted the windows & windows1 mips to bmp. Made the windows & windows1 bmp. darker than made the windows ti bmp & windows1 ti bmp. lighter but when I converted them back into mips, they were a lot lighter than the originals plus they were missing the black bars and the black that was around the edge of the windows. Thanks for any help.