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Select the type of position you want to use.
| | | Usage | Value | Default variable |
|---|
| Current position: P | Use the current (displaced) surface position | 0 | P |
| Undisplaced position: Po | Use the surface position before it was displaced | 1 | Po |
Deform : __Pref | Use a reference position primitive variable in object space | 2 | __Pref |
| Deform & transform: __WPref | Use a reference position primitive variable in world space | 3 | __WPref |
| Note |
|---|
You can only use __Pref and __WPref if these primitive variables have been attached to your geometry using your bridge product. Typically known as a Reference or Rest pose. Note that these are just names, the underlying bridge product provides the data as named, not the pattern node. If using a procedural such as Alembic, be sure the data has Pref baked into the objects on export. |
Why use the un-displaced position ?
When using the same 3d noise in the BxDF and the displacement, you should use Po to make sure the patterns are lining up.
| Before After Image Slider |
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| method | fade-in |
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| width | 256px |
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| leftImage | image_galleries_uuid_pxrmanifold3d_p.jpg-760fc439-a935-4114-a682-1271409e49ae |
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| rightImage | image_galleries_uuid_pxrmanifold3d_dispp.jpg-b66a550d-2a96-4977-b34a-c1f21fa4c9dc |
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| Before After Image Slider |
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| method | fade-in |
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| width | 256px |
|---|
| leftImage | image_galleries_uuid_pxrmanifold3d_p.jpg-760fc439-a935-4114-a682-1271409e49ae |
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| rightImage | image_galleries_uuid_pxrmanifold3d_disppo.jpg-642d774f-eb75-4ec8-9221-5a0a814e71b6 |
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|
| Before After Image Slider |
|---|
| method | fade-in |
|---|
| width | 256px |
|---|
| leftImage | image_galleries_uuid_pxrmanifold3d_dispp.jpg-b66a550d-2a96-4977-b34a-c1f21fa4c9dc |
|---|
| rightImage | image_galleries_uuid_pxrmanifold3d_disppo.jpg-642d774f-eb75-4ec8-9221-5a0a814e71b6 |
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Bad: using P Good: using Po Left: P Right: Po
Pref
Name of geometry Pref (Maya uses __Pref and __WPref).
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