FieldBase
FieldBase is an abstract schema that acts as the base class for all UsdVol field schemas. If you need to extend UsdVol with your own custom Field schemas, your Field schemas should directly or indirectly inherit from FieldBase.
Don’t Create FieldBase Prims Directly
As FieldBase is an abstract schema, in practice you will most likely use one of the various derived field schemas when creating new field prims, such as OpenVDBAsset or Field3DAsset.
Properties
Inherited Properties (Xformable)
xformOpOrder
USD type: token[]
Inherited Properties (Imageable)
proxyPrim
USD type: rel
(relationship)
purpose
USD type: token
Fallback value: default
visibility
USD type: token
Fallback value: inherited