Orient surfaces so they face toward or away from the camera.
This may be necessary before using tools that depend on surface orientation such as Ambient Occlusion, Offset and Parting Line.
Reversing the orientation of a surface does not affect the U or V parametric directions, and preserves construction history.
Change the orientation of many surfaces
This workflow lets you do the bulk of your orientation work by automatically changing the orientation of any number of surfaces at once, and shading the results (blue or yellow) for immediate feedback.
All surfaces in the scene are shaded in blue and yellow.
Surfaces facing toward the camera are shaded in blue; surfaces facing away from the camera are shaded in yellow.
After orienting all the surfaces to face toward the camera, all the surfaces in the scene should be blue.
Reverse the orientation of a single surface
Reversing the orientation of a single surface at a time, without any shading of your model, is useful for fine alterations.
An arrow appears to show which way the surface is facing.
The direction of the U and V parameters is not affected. Construction history is preserved.