Examples

Examples

Parallax Mapping Relief Mapping

Assumption: the height at one Kaneko (2001): take an educated guess of what should be seen in a pixel by examining the height of what was found to be visible Height field texture can be stored in unused color channel (alpha)

Parallax Mapping (cont) Offset of texture coordinate from similar triangles V: tangent space vector (pos to camera) Problem:  Shallow viewing angle (small v z )

Parallax Offset Limiting (Welsh) Offset-limited version: Limit the amount of shifting to never be larger than the retrieved height

Relief Mapping

Also known as … Independently discovered under different names:     parallax occlusion mapping relief mapping steep parallax mapping inverse displacement mapping

Comparison

Comparison

Comparison Parallax Map Relief Map

Idea

References http://graphics.cs.brown.edu/games/St eepParallax/index.html#images