The Parallax Mapping
From Xtreme3D
The Parallax Mapping
The Parallax MappingM���� of terrain visibility on the surface. Represents a superior Normal mapping. Improvement is that the normal map not only affects the illumination of surfaces, but also on the offset of the texture coordinates. That is, the terrain becomes �������������� and different looks from different angles.
See also the Normal Map, Bump Mapping, Displacement Mapping.