[Gimp-user] transparent pixel color

I have a .tga image with a large portion of fully transparent pixels. Doing a color picker on one of these pixels gives Red, Green, Blue, and Alpha all equal to zero. I would like to do a global transformation on my image, making all pixels that have an alpha of zero have RGB be 0xff00ff. In oth

[Gimp-user] alpha channel computation

Hello. I have a TGA image that is fully opaque. I want to introduce translucency to the image, making each pixel translucent according to how far away from black it is. If a pixel is originally black, it becomes fully opaque. If a pixel is originally white, it becomes fully transparent. If a p