Examples
Examples
Parallax Mapping
Relief Mapping
Assumption: the height at one
pixel is similar to the height at
another
Parallax Mapping
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 vz)
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