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Adding bump mapping on a game?

Posted: Tue Sep 19, 2017 9:14 pm
by SCP-9341-D
I am planning on adding bump mapping to 087-B, but i just know the very basics of Blitz3D. Can someone teach me how to add it?
Oh, and by bump mapping, i mean like this:
Image
I would be very thankful if someone could explain to me :)