Forums Houdini Indie and Apprentice USD Export (Polygroups, ShadingGroups)

USD Export (Polygroups, ShadingGroups)

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tomtm
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I need to export a simple object as USD.
I made 2 Facesets (Polygroups) but the export doesn't include this facesets.
Does someone has experience exporting USD to other applications.

Thanks Tom
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mestela
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The usd terminology for this is a GeomSubset. It's like a selection set in Maya, mainly used for shading assignment in USD more than direct manipulation.

In Lops you can set the sopcreate node to treat groups as geomsubsets, Maya's USD importer appears to understand them, but beyond that I'm not sure what you'd do, I haven't used Maya properly in ages.

I've attached a hip if you wanna take a look.


Edited by mestela - July 14, 2022 23:16:28

Attachments:
lops_geomsubset.hip (121.6 KB)
subset_groups.PNG (93.0 KB)
maya_geomsubsets.PNG (39.5 KB)

http://www.tokeru.com/cgwiki [www.tokeru.com]
https://www.patreon.com/mattestela [www.patreon.com]
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tomtm
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Hi Mestela

Thank you for your help, it works.
I didn't know, that it has to be out of a LOP Network.
This USD is something I still have to get in my brain :-)

Best Tom
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sepu
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Just to add to what Matt said if you want to do more procedural or edit inside Maya. I would go with Bifrost USD where you have way more possibilities + procedural than inside Maya USD.

Here are 2 examples of reading the data from Solaris (From Matt example) and applying materials and also creating the GeomSubset yourself inside the graph (torus) to import for example. Basic setups.
Edited by sepu - July 18, 2022 21:52:25

Attachments:
maya_i5q9DaMDpy.png (287.7 KB)
houdini_TnPL0Qz636.png (538.5 KB)
maya_1ZqVdP8yiZ.png (250.2 KB)
SolarisToBF.ma (163.4 KB)

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