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In RenderMan for Maya, this attribute is enabled by the "Prevent polygon cracking" (rman_preventPolyCracks) check box.
Image Removed
Image RemovedHover over the image to see its effects.
| Rollover Image Link |
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| hover | https://rmanwiki.pixar.com/download/attachments/56495843/smoothdisplacement_1_dsp.jpg |
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| image | https://rmanwiki.pixar.com/download/attachments/56495843/smoothdisplacement_0_dsp.jpg |
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| Before After Image Slider |
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| hover | false |
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| method | overlay |
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| width | 100% |
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| overlayedSlider | true |
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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 When you hover over the image, notice how using smoothed normals warped the cube's displacement pattern and changed its appearance:
| beforerollover-after-slider-macro-v2 |
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| hover | false |
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| method | overlay |
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| width | 100% |
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| overlayedSlider | true |
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leftImage | image_galleries_uuid_| image-link |
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| hover | smoothdisplacement_topo_0_jpg-6b518b9f-2224-4217-83f7-9a7b8d9e1dd2 | rightImage | image_galleries_uuid_1.jpg |
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| image | smoothdisplacement_topo_1_jpg-15a93198-512d-49a9-ad78-2d11cc3117410.jpg |
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|
You can avoid that effect by inserting additional edges near sharp edges. This will limit the normal interpolation to the areas next to the edge and generally preserve the original appearance.
| beforerollover-after-slider-macro-v2image-link |
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| hover | false |
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| method | overlay |
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| width | 100% |
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| overlayedSlider | true |
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| leftImage | image_galleries_uuid_smoothdisplacement_topo_0_jpg-6b518b9f-2224-4217-83f7-9a7b8d9e1dd2 | rightImage | image_galleries_uuid_2.jpg |
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| image | smoothdisplacement_topo_2_jpg-b521bc27-e766-4be6-a57e-389cb94287530.jpg |
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