Hello! I have a strange problem that's comeback me crazy... I'm exporting my windscreen shape with the following material config: as you can see, the same material configuration of the "developers guide" No problem when i'm export the shape. But, when i load my car in devmode mode... i have this error message: Really, i don't know what's happen....
It is a known bug, that hopefully will be fixed soon. As a temporary solution, put a small (32x32 pixel) math.bmp texture into the folder where all other textures for the mod are.