pxrUsdReferenceAssembly Equivalent for Maya USD

[jonahjnewton]

Hey,

I'm trying to create USD assembly reference nodes in Maya 2022 using cmds.assembly, however as pxrUsd is no longer used in Maya 2022, I am not sure what node type to use instead of pxrUsdReferenceAssembly. Maya's assemblyReference only seems to reference Maya scenes with assembly definitions, not USDs.

I managed to make a workaround by using proxyShapes, however my company's publish workflow requires cmds.assembly nodes, and proxyShapes do not have the assembly type.

Any help on this would be very appreciated.

Kind regards,
Jonah

[santosg87]

Hi @jjonahlowercase our framework on Maya 2023 should have the needed nodes, as some of the comds you're looking for are deprecated, if I recall correctly.

I will go ahead and move this thread to a discussion, and maybe we can get some answers for your case :)

[jonahjnewton]

Hey, back again to ask further on this.

It seems the main issue with our workflow right now is that to query edits to USD data when publishing a shot, we use the MayaAPI EditUtils script (the getEditsThatAffect method specifically) to query edits made to set assembly nodes (however this MayaAPI tool requires assembly nodes to be used).

If assembly nodes are no longer supported, is there currently/are there any plans to have a MayaUSD alternative to query edits on a proxy shape? If this already exists, I'd love to learn more.

Thanks!

[mdubrois]

You can use the sessionLayer linked to the ProxyShape.

[jonahjnewton]

Hi, getting back to this.

I understand that I can use the sessionLayer as the edit target for edits to a USD stage in Maya, however when publishing I would like to get the edits on the set layer to add to an override for a shot USD for example without needing to overwrite the set USD. We previously did this by querying the eidts with the getEditsThatAffect method in the MayaAPI, however that requires an assembly node as a parameter and does not work with a USD proxy shape.

If there was some way to list the edits to a USD stage in a similar way that this getEditsThatAffect method returns, that would be amazing to know.

Cheers

[Lucas3Dspain]

Hi @jonahjnewton ,
I'm not sure if this will help you but I guess you could set the anonymous leyer as the targetLayer (and do the work there) then for publishing you save the anonymous layer. As the new version for x department

[gelshoffNV]

If you want to query / edit USD, you can gain access using the mayaUsd.lib like:

import mayaUsd.lib
stage = mayaUsd.lib.GetPrim('usdProxyShape').GetStage()
print(stage.GetSessionLayer().ExportToString())

where 'usdProxyShape' is the dagPath to your stage proxy shape