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Clarify mesh subdivision options in physics documentation #1948

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6 changes: 6 additions & 0 deletions pxr/usd/usdPhysics/overview.dox
Original file line number Diff line number Diff line change
Expand Up @@ -379,6 +379,12 @@ a bounding sphere. If an implementation does not support a particular kind of
approximation, it is recommended that it falls back to the most similar
supported option.

Note that use of the subdivision attribute (\ref
UsdGeomMesh::GetSubdivisionSchemeAttr()) can cause features such as corners and
edgeds to be removed from the graphical representation. In order to ensure the
physics representation accurately matches the graphical representation, this
attribute should be accounted for when generating physics colliders.

Collision meshes may be specified explicitly (for example one that was
processed by a particular decimator) by adding the custom collider mesh as a
sibling to the original graphics mesh, UsdGeomImageable _purpose_ to "guide" so
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