Arnold wont render through GPU even though it's selected in the render setup

[johnhJQ9J8]

Hi Guys,

Trying to render an animation with Arnold and it's using the CPU not the GPU and taking 30sec -1min for each image 1920x1080. I selected GPU in the Arnold system render setup and I have selected the RTX4000 in the NVIDIA control panel and windows graphic settings but it's still rendering through the CPU.

Have I missed something here?

Any assistance would be much appreciated

Regards,

J

3DSMAX 2022

HPZ4 G4 Workstation
Processor Intel(R) Core(TM) i9-10920X CPU @ 3.50GHz 3.50 GHz
Installed RAM 64.0 GB (63.8 GB usable)

GPU NVIDIA Quadro RTX4000
System type 64-bit operating system, x64-based processor

[CiroCardoso3v]

We need more details. Which Arnold version are you using? Have you Pre-populate Cache? Do you have your drivers updated? When there is an error on GPU and it can't render, it automatically jumps to CPU. So, maybe you have a couple of issues you need to fix. The Render Message Window, usually gives you some idea of what is wrong, but you also have the Logs that will provide more detailed information.

[oliver]

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@CiroCardoso3v wrote:

Have you Pre-populate Cache? 

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Most likely this! 

[johnhJQ9J8]

Thanks for the responses guys here are the error messages and I already prepopulated the Cache.

I'm running Arnold 6.2.0.0

[oliver]

Ah, you use unsupported materials, namely Autodesk Generics. 

[johnhJQ9J8]

As that why it's not using the GPU?

[oliver]

Yes - Arnold GPU does not yet support everything the CPU-mode does. It will one day... As @CiroCardoso3v mentioned, when an issue makes GPU-rendering impossible it falls back to CPU-rendering. I guess you pulled those materials from an AutodeskMaterialLibrary and I assume you have activated the 3dsMax Map Support in the render-settings (otherwise it wouldn't render neither in CPU- nor GPU-mode).

So either you re-create those materials with Arnold- and/or OSL-nodes or you stick with CPU-rendering. 

[CiroCardoso]

Convert those materials using Mads' Converter. 

https://www.masd.dk/arnoldconverter/