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Andres Kluge avatar image
Andres Kluge asked

Object Path in Usd procedural

Hey,

we are rendering crowds using the usd procedural. We have built the hirarchy up so that each row in each section of the stadium has its own path (/Crowd/Sector2/Row4/Agent01 etc) and ideally i would like to pick specific sectors and rows based on the shot camera and actual extras on the stadium. The object path doesnt seem to support any wildcarding or multiple inputs. Is this somehow possible in any other way without creating tons of procedural nodes?

thanks,

andres

proceduralsusd
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Stephen Blair avatar image
Stephen Blair answered

How about using an operator to hide or disable the nodes you don't want to see?

Hard part is you need to know the Arnold node names

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how would i find the arnold node names? is there any way to look those up?
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I would start with a simple, small crowd and either
  • export an ASS file and inspect it (with a text editor)

or

  • test operators with selections like *.(@node=='polymesh') or *Row4*, and check a debug-verbosity Arnold log to see what was matched by the operator
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Andres Kluge avatar image Andres Kluge Stephen Blair ♦♦ ·
that works nicely, thanks!
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Andres Kluge avatar image
Andres Kluge answered

looking at it some more it seems like it wont render 2 usd procedurals with different agents specified in the object path. Renders both of them fine separately. The errors seem to be different every time.

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