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In RenderMan for Maya, this attribute is enabled by the "Prevent polygon cracking" (rman_preventPolyCracks) check box. It should only be enabled when necessary as it uses a bit more memory.
| Before After Image Slider |
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| method | overlay |
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| width | 100% |
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| leftImage | image_galleries_uuid_smoothdisplacement_0_dsp_jpg-b4240a23-c538-4a46-ba56-21b2eaed643e |
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| rightImage | image_galleries_uuid_smoothdisplacement_1_dsp_jpg-3ca84d73-fcef-4865-9815-53ecba4276f0 |
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| Note |
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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 how using smoothed normals warped the pattern warping happening on the cube has and changed its appearance:
| Before After Image Slider |
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| method | overlay |
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| width | 100% |
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| leftImage | image_galleries_uuid_smoothdisplacement_topo_0_jpg-6b518b9f-2224-4217-83f7-9a7b8d9e1dd2 |
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| rightImage | image_galleries_uuid_smoothdisplacement_topo_1_jpg-15a93198-512d-49a9-ad78-2d11cc311741 |
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You can avoid that effect by inserting additional edges near sharp edges, like so:. This will limit the normal interpolation to the areas next to the edge and generally preserve the original appearance.
| Before After Image Slider |
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| method | overlay |
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| width | 100% |
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| leftImage | image_galleries_uuid_smoothdisplacement_topo_0_jpg-6b518b9f-2224-4217-83f7-9a7b8d9e1dd2 |
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| rightImage | image_galleries_uuid_smoothdisplacement_topo_2_jpg-b521bc27-e766-4be6-a57e-389cb9428753 |
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