True bump mapping requires a bump map texture for every real texture you want to apply it to. There are some algorithms out there that approximate bump mapping without using another texture but ...

I was under the impression that EMBM was the G400 implementation of one of the techniques used in bump mapping. For one thing, it's texture based.<BR>I thought that pixel shaders used a different ...

That's thanks to a combination of bump mapping and parallax occlusion, which together give textures the appearance of having depth and physical irregularity, something you just don't normally see ...