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Object Path in Usd procedural

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Message 1 of 8
andreskluge
359 Views, 7 Replies

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

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7 REPLIES 7
Message 2 of 8
andreskluge
in reply to: andreskluge

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.

Message 3 of 8
Stephen.Blair
in reply to: andreskluge

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



// Stephen Blair
// Arnold Renderer Support
Message 4 of 8
andreskluge
in reply to: Stephen.Blair

how would i find the arnold node names? is there any way to look those up?
Message 5 of 8
Stephen.Blair
in reply to: andreskluge

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


// Stephen Blair
// Arnold Renderer Support
Message 6 of 8
andreskluge
in reply to: Stephen.Blair

that works nicely, thanks!
Message 7 of 8

Hi Stephen

 

I've just run into this issue myself. I have a scene layout published to USD and I want to pass it to the Arnold ROP as multiple USD procedurals so I can render some prims for beauty and others as phantoms, mattes, etc.

 

Is it still not possible to pass multiple paths in the Object Path parameter?

 

David

Message 8 of 8


@david.schneiderKZE5Q wrote:

Hi Stephen

 

I've just run into this issue myself. I have a scene layout published to USD and I want to pass it to the Arnold ROP as multiple USD procedurals so I can render some prims for beauty and others as phantoms, mattes, etc.

 

Is it still not possible to pass multiple paths in the Object Path parameter?

 

David


usd.object_path is a single path

 



// Stephen Blair
// Arnold Renderer Support

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