http://wiki.blender.org/index.php/Manua ... ormal_Maps
What does it mean that we don't see normals pointing towards z- ? What we see depends on the direction the camera is pointing.Normal maps in Blender store a normal as follows:
* Red maps from (0-255) to X (-1.0 - 1.0)
* Green maps from (0-255) to Y (-1.0 - 1.0)
* Blue maps from (0-255) to Z (0.0 - 1.0)
Since normals all point towards a viewer, negative Z-values are not stored (they would be invisible anyway). In Blender we store a full blue range, although some other implementations also map blue colors (128-255) to (0.0 - 1.0). The latter convention is used in "Doom 3" for example.
I assume this refers only to normals baked with camera or tangent and not the ones baked with object and world, am i right? Does this means that for object and world blue maps from (0-255) to z (-1.0 - 1.0) ?