There are a few instances where SideFX have changed the default node shapes for native VDB nodes and I think we should update the open-source ones to align them.

Primarily, this involves adding OpFactory::setDefaultShape("") and then introducing the overrides to the SOP registration.

Here are the SideFX overrides:

• VDB SOP - "cloud"
• Convert VDB - "trapezoid_up"
• VDB from Polygons - "trapezoid_up"

I suggest we change OpenVDB Create SOP to cloud and add the trapezoid shapes to the equivalent open-source SOPs.

JeffLait - I can deduce that the default shape of the Convert VDB SOP was changed to match the Convert SOP. However, I can't explain why not also change Convert VDB Points SOP and why to change VDB from Polygons SOP but not VDB from Particles SOP?