Face Normals

Face Normals should point outward to avoid an backface culling errors at render time

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How to Check & Change Direction of Face Normals

There are two methods in Maya to check for backfaces

• Turn on Display > Polygons > Backface Culling
• Turn on Display > Polygons > Face Normals

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Changing a face’s normal direction is a one step process

• In the Polygons menu set, go to Normals –> Reverse

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Video Tutorial

Edge Normals

Edge normals define the softness or crispness of geometry as it transitions from one face to another in the same mesh.

• Here’s an example showing problematic edge normals and corrected edge normals

• Here’s an example when a hard edge has soft normals and must be fixed

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How to Correct Incorrect Edge Normals

• Making edges hard that should be soft >Select required edges and select Normals–>Harden Edge

• Making edges soft that should be hard >Select required edges and select Normals–>Soften Edge