Auria {l Wrote}:We do not use BMP anywhere in the game as far as I know.
Correct, even the fonts are png. So most likely the problem is in handling of png files. Irrlicht has two options for libpng: either use the build in, or an external one. Perhaps trying both options would help?
Regarding PNG transparency, I have no idea, you would need to ask irrlicht folks (and check the drivers)
Agreed as well. Try using any of the irrlicht demos and see if they have the same problem.
Cheers,
Joerg