I make a Gif image of a firtree on a transparent background, which works when
pasting it on to any background image; but when I make the required extended
bitmap with DXTBMP and then in EOD make a tree object and use the firtree as
the texture; then in AFW, place the API in my airport, the firtree is there in
every detail, except there is a white rectangle around it. How do I get the
image to retain its transparent background?