Meaning of bump mapping in English:

bump mapping

noun

  • (In computer graphics) any of various techniques for providing the surface of a computer-generated object with a textured appearance by manipulating the calculations that determine how each pixel is illuminated.

    Bump mapping does not change the geometry of the surface of the object, and is for this reason often less demanding computationally than other techniques.

Origin

1980s; earliest use found in IEEE Spectrum.