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In RenderMan for Maya, this attribute is enabled by the "Prevent polygon cracking" (rman_preventPolyCracks) check box.
Hover over the image to see its effects.
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"Prevent polygon cracking" should only be enabled when necessary as it uses a bit more memory. The amount used is proportional to the number of vertices in the mesh. |
Notice When you hover over the image, notice how using smoothed normals warped the cube's displacement pattern and changed its appearance:
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