Render To Texture

Rendering to texture, or "texture baking,” allows you to create texture maps based on an object's appearance in the rendered scene. The textures are then “baked” into the object that is, they become part of the object via mapping, and can be used to display the textured object rapidly on Direct3D devices such as graphics display cards or game engines.

http://www.spot3d.com/vray/help/150R1/tutorials_baking_part1.htm



http://www.youtube.com/watch?v=2rHJksZglDY