Game Development Reference
In-Depth Information
FIGURE A.4 Transfer Surface Information options
The Transfer Surface Information tool will transfer surface information from a
model to an image file. We can use it to generate our normal map.
4. Under Target Options, set Transfer to export the Tangent Space Normals. These
normals are evaluated locally and can be rotated to point in the direction of the
polygon.
Object Space normals always point the same direction, so they are no good for de-
fining our map. (Make sure to consult your lead programmer on which coordinate
system to use; there are some appropriate uses for object space normals.)
5. The Map Width and Map Height values define the size of the bitmap image;
256×256 is fine for this example.
6. Specify a filename and location, and the format for the image to be exported.
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