PxrManifold3D

This nodes allows artists to place patterns using a 3D projection as opposed to a 2D solution often used for textures reliant on UVs. This allows selection of Pref (for deforming meshes) and specification of a coordinate system to transform to. 

Input Parameters

Scale

Scale the frequency of the feature uniformly in 3D.

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

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.

 

                                   Bad: using P                                                                   Good: using Po                                                                       Left: P Right: Po

Pref

Name of geometry Pref (Maya uses __Pref and __WPref). 

Coordinate System

Name of a coordinate system transform to apply to the manifold. (Maya calls these place3d nodes).

Output Parameters

result

The 3D manifold.

resultX

A float representation of the X component of the manifold.

resultY

A float representation of the Y component of the manifold.

resultZ

A float representation of the Z component of the manifold.