high performance computing on graphics processing units: hgpu.org

Bump mapping is a normal-perturbation rendering technique for simulating lighting effects caused by patterned irregularities on otherwise locally smooth surfaces. By encoding such surface patterns in texture maps, texture-based bump mapping simulates a surface’s irregular lighting appearance without modeling the patterns as true geometric perturbations to the surface. Bump mapping is advantageous because it can decouple a texture-based description of small-scale surface irregularities used for.