Normal mapping

How, in broad terms, do you implement normal mapping in
B3D?....... or do you need a userlib?

Download "demo2" from Rob's sig. He has a demo of normal mapping.

Thanks Joe - I already saw the demo which prompted my question. Looks lovely!

There is an example in my signature...It's a bit more complex than Rob's demo (as far as I know), take a look, and see if you can figure it out :)