Bump Mapping

Introduced by James F. Blinn (1978).

Idea #

Mapping a grayscale image over a surface, where the color indicates bumps.

How it works #

Perturb the surface normal, used for light calculations, based on the bump map.

Paper #

@article{blinn1978simulation,
  title={Simulation of wrinkled surfaces},
  author={Blinn, James F},
  journal={ACM SIGGRAPH computer graphics},
  volume={12},
  number={3},
  pages={286--292},
  year={1978},
  publisher={ACM New York, NY, USA}
}