Semi-transparent image

I'm trying to use a semitransparent image, one that is solid in some areas, transparent in others, and completely invisible in some areas. Is this possible with png? And how to convert my TGA-files correctly? The docs says that blitz only support BMP, JPEG ang PNG files, so I'm pretty much stuck with the TGA files.

Since you post this in the Blitz3D Forum I suggest to use sprites or quads for that. Basicly load the tga as a sprite and position it in front of the camera, then parent it to the camera. you can also use a quad that has been loadad or created from 2 triangles, it might be better, I remember in earlier times Sprites didn't support fog, but maybe they support it now (?). However, using your Image as a texture will allow to use any transparency, with TGA the alpha map is completely independent from the pixel brightness (unlike with JPG, BMP aso.). Simply use the alpha-flag (value 2) when you use a Quad, or use a Sprite in Alpha Mode (and not Addition or Multiplication), which is default afaik.

Oh, thougt blitz would only load BMP, JPG ang PNG, but that seems to be a limitation only to the LoadImage function. For another project I tried to use Orthographic mode to make a 2D world, that really sucked. I ended up using 27 individual images for Trio, some alpha map would have been smarter, but I'm not gonna change it now.

And thanks for your reply.

PNG supports alpha.