Arnold fails to render/crash

[ModestMoustache]

Hey

So basically I have this problem: I have a model which I want to use some displacement maps on, but everytime I load the maps into the model and try to render using the Arnold renderer, it doesn't render and eventually uses up so much memory that my computer freezes and forces me to pull the plug.

This is obviously not normal and I doubt that a few displacement maps could cause this. I get a number of error messages like:

// Warning: The OpenSubdiv Catmull-Clark subdivision method cannot be applied to non-manifold geometry. Exo_Organ_Organ_2018:Main_MeshShape will use "Maya Catmull-Clark" subdivision method for Smooth Mesh Preview. //

// Warning: Fail to create OpenSubdiv TopologyRefiner. //

// Warning: OpenSubdiv gets different edge topology to Maya poly. //

# Error: invalid syntax #

The displacement maps are made in photoshop in the Tiff format, I use aiStandard_Surface Arnold shaders for the displacement maps. I've followed tutorials online for setting up the displacement maps. The model uses smoothed geometry.

I've tried using different displacement maps, changing shaders, nothing works, what can I do or what causes the errors to occur?

I can supply the maps if necessary.

Thanks

Max

[Stephen.Blair]

Those don't look like Arnold errors. They look like errors coming from Maya.

In any case, it looks like there's bad geometry (xo_Organ_Organ_2018:Main_MeshShape) in Maya and that's the problem.

[ModestMoustache]

Thanks for the quick reply, do you know of any ways to find this bad geometry?

[anselemnkoro]

Hi i seem to be having same problem when rendering on a network

[teddude75]

@Max Ashby

here's a link

https://knowledge.autodesk.com/support/maya/learn-explore/caas/CloudHelp/cloudhelp/2017/ENU/Maya/fil...

This strange geometry in the example by Maya can also be your uv's. Make sure that your uv shells are not cut in a strange way. Simular to the second example. The clean up tool can help to identify any problems.