[caldrail]

Not supported by the game. I think bump mapping came with DirectX 9 and the corresponding version of OpenGL, which was after Il-2s time.

bump mapping works on map textures as standard but the game engine was written to include it. As far as I'm aware, there's no such facility for the 3d models in game. I seem to remember trying something like that last year but I couldn't get any result.