I imported sprite sheets and I split them up using paint and cut and paste from a backdrop object. When I import parts I can "pick" a color to be the transparent color and it works. Sometimes I do that and it won't be transparent. I have alpha layer off and transparent selected but it won't work. I Also try to delete it and it won't delete (the part goes to transparency with checkered image). I also try to specify the color's rgb value in the transparency color property in the objects transparency property section. Neither work and I'm confused on why it doesn't. It works on some images with same background color (checked rgb values of it) and other images with same background don't work. What could cause this?