Arnold not rendering with Udims - houdini 17.5 - render region grey

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Adam Phillips asked · Jun 11, 2019 at 09:59 AM

Arnold not rendering with Udims - houdini 17.5 - render region grey

Arnold seems to have a real issue with rendering in the render scene or in a region once I load a displacement map across UDIMs. The maps should work fine with the %(UDIM(d setup, i'm basically transferring everything from rendering in Mantra to rendering in Arnold due to Mantra's excessive hunger for ram.It's really not the biggest scene in the world. but as soon as I plug in a 4 UDIM displacement Arnold IPR doesn't generate anything. I've set my geometry to only 1 subdivision iteration.

My CPU is a Ryzen Threadripper 2950x - 16 core - which should at least be able to handle a basic setup like this.

render houdini displacement

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Answer 1 · 2019-06-11T11:57:58Z

Adam Phillips answered · Jun 11, 2019 at 11:57 AM

Thanks @Stephen Blair that worked a Treat!

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Answer 2 · 2019-06-11T11:56:18Z

Stephen Blair answered · Jun 11, 2019 at 11:56 AM

You use <udim> in the Filename, like this:

$HIP/colortiles.<udim>.png

That will load colortiles.1001.png, colortiles.1002.png, and so on

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Answer 3 · 2019-06-11T10:41:55Z

Adam Phillips answered · Jun 11, 2019 at 10:41 AM

Thanks...can you point me to an example if %(UDIM)d doesn't work? thanks @Stephen Blair

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Answer 4 · 2019-06-11T10:35:57Z

Stephen Blair answered · Jun 11, 2019 at 10:35 AM

You have to use the <udim> tag

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Answer 5 · 2019-06-11T10:07:49Z

Adam Phillips answered · Jun 11, 2019 at 10:07 AM

Actually - I'd like to add that it's not jdisplacement. It seems to be ANY UDIM textures. I'm working on windows 10 also.

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Stephen Blair ♦♦ · Jun 11, 2019 at 10:34 AM

@Adam Phillips udims for surface shading work for me
didn't try displacement yet

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