Constant error and crashhing during render on Arnold

[franek_statucki]

Hi i am working on a small project for my studies and i have found myself with a problem regarding rendering on Arnold. I don't really know the reason why, only warning i got before was about small padding but i solved it by delating height map. I have the raport but i cant find the cause in it. Can anyone tell my what should i look for?

[Diffus3d]

The error seems to be:

<upi_error>Error accessing UPI repository in the 64-bits registry</upi_error>

However it's not super clear what that means.  What are your system specs?  (Windows versions, Ram, GPU, CPU).  It might be a warning that it's running out of resources or something.  If it only happens when rendering, you might have more luck posting in the Arnold forums.  

Best Regards,

[franek_statucki]

I somewhat menaged to render it on debug, losing sound during process. I delated bump map of one object and that seamed to case the problem.
My specs are:
Intel(R) Core(TM) i9-14900KF 3.20 GHz 
64GB Ram
NVIDIA GeForce 4080
And i don't think that level of animation should use up its resources

[Diffus3d]

Interesting.  Perhaps something was up with the map node?  Some tweak that caused problems?  Hard to say.  What map node type was it?

Best Regards,

[franek_statucki]

It was normal map causing the problem i think, warning was about a padding but i couldn't find anything where i can set padding on the internet so i just tosed it away. Here is a full texture 

[Diffus3d]

Nothing seems off about the map, must have been some kind of setting in the bitmap node itself within 3dsmax.  Weird one.

Best Regards,

[CiroCardoso3v]

For the padding warning, you don't need to remove the height map. Arnold is just giving you a suggestion for you to have a better result while using displacement. You need to pick up the value Arnold gives you and change it here

Regarding the crash, something that will help us understand what is happening is a render log.

https://www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/How-to-get-an-Arno...

Get the log and post it here.

[franek_statucki]

Sure, here goes the log. It render there was ok but sound was out of the windu ;D

[franek_statucki]

Well i am quite new in 3Ds and i didn't know where i can find padding. Searching net didn't help with that for sure.
Anyway thanks for your ss i menaged to find where it is now so TY.

[CiroCardoso3v]

How are you setting up the material for the displacement map? The padding option is on the Arnold modifier that you add to the geometry you are applying the displacement to

Thanks for the log. I can see that you are using GPU and that the render finishes fine. Are the drivers for the GPU card updated? If your scene isn't too big, can you Archive it and post it here so I can test it on my side?

[franek_statucki]

Sure thing, i am happy to learn what and how. for texture i use uv map usually .

[CiroCardoso3v · Accepted solution]

Thanks for the scene. I was able to see what was causing the issue, and I believe this is a bug. I already reported to Devs. But for now while in GPU, don't use Light Sampling

This is just a temp fix until the Devs fix this issue.

Now, I had a look at your scene and I have a couple of suggestions.

First, isn't reliable and safe to render video files

For several reasons, but mostly because you lose the opportunity to make further adjustments to the output and also because if the render crashes on the last frame, you lose the entire video file. The best option is to render EXR files or TIFF. You can always use free software like DaVinci to comp everything together.

Second in how you build the materials here is a quick recap:

All of these maps - for roughness, metalness, normal, bump and displacement

Need to be loaded with the gamma 1.0

And you can see the difference here compared to the previous image

This is going to avoid render artifacts and other issues.

Then to use normal maps you need to use the normal map node instead of the bump3d

If you need to combine a bump and a normal map

If you want to have more control over the displacement and avoid having those padding warnings, you need to use an Arnold Properties modifier and apply the displacement that way.

Hope you find this useful

[franek_statucki]

Thank you very much, it will help for sure doing stuff in the future.

[CiroCardoso3v]

You are welcome. Which Nvidia driver are you using? Can you try to go back to something like 546 and do another test? I am going to do the same on my side, but it seems it could be a bug introduced in one of the recent Nvidia driver updates.