Names

• bump mapping
• normal mapping
• slope^[1]

Description

• "bump mapping. It allows fake-3D visualization of subtle details previously hidden by the slow gradients in the palette." Botond Kósa^[2]
• Normal map: "Fine scale relief on flat surfaces can be visible with proper lighting. " Arnaud Cheritat^[3]
• unity3d : ParameterNormalMap
• "Slopes rendering is originally a screen-space post-processing effect, using differences between neighbouring pixels' smooth iteration counts. More recently it can use directional distance estimate (normalized by pixel spacing) instead, which I think gerrit proved is equivalent in the limit of infinitely fine pixel grid." Claude Heiland-Allen

Images

• 
  animation of normal mapping
• 
  normal mapping

Programs

• Mandel Machine

code

• c
  • image and c code from commons
• c++
  • kalles-fractales-2- lines 933 to 998
• python
  • matplotlib example code: mandelbrot.py

References

1. ↑ /fractalforums.org : algorithm-for-rendering-slope-in-a-fractal
2. ↑ fractalforums " bump-mapping-and-improved-histogram-coloring-v1-3-10-is-available/
3. ↑ A Cheritat wiki : Mandelbrot_set#Normal_map_effect