Troubleshoot Transfer Maps search envelope produces unexpected results

User Guide > Rendering and Render Setup > Shading > mental ray for Maya Shading > Advanced mental ray for Maya shading > mental ray for Maya transfer maps >

If you are generating a mental ray Ambient occlusion or Custom map, the normal direction that you choose (under the mental ray Common Output section) affects the results of your search method. The target surface's normals determine what is inside of a search envelope - the inverse of the normal is what is inside the search envelope. Therefore, if you reverse the normal direction, the search results are also reversed.