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eugene_lukas
Participant
May 27, 2025

Iray stuck on 'warm-up' with RTX 5090 – only works with CPU enabled

  • May 27, 2025
  • 23 replies
  • 3713 views

Hi,
I recently upgraded to a new ASUS RTX 5090, and I’m experiencing an issue with Iray in the latest version of Substance Painter.
All system and GPU drivers are fully up to date.

When I set Iray to render only on the GPU (disabling CPU rendering), the viewport freezes and displays “Iray warm-up” in the bottom-right corner. The program doesn’t crash, but the rendering does not proceed — the image remains frozen indefinitely.

If I re-enable CPU rendering, the frame immediately unfreezes and Iray starts rendering normally.

I have tested this with both the latest Studio and Game Ready NVIDIA drivers — the issue remains the same.

This problem did not occur with my previous GPUs (GTX 1070, RTX 3090, RTX 4090) — they all rendered fine using GPU-only mode in Iray.

Could this be due to Iray not yet supporting the RTX 5090 architecture?
Is there a workaround or upcoming update planned to support this GPU?

Thank you in advance!

      23 replies

      E
      eugene_lukasAuthor
      Participant
      August 9, 2025

      Hey, with the new 11.0.3 build 4609 and NVIDIA driver 580.88, the Iray GPU issue is fixed. It’s running perfectly and is stable on the ASUS RTX 5090 now. Thank you.

        G
        graphic5FEE
        Known Participant
        August 6, 2025

        Hello..thanks for the new Painter update..the problem is solved and iray is enabled on the 5080 graphics.

          Cyril Dellenbach
          Community Manager
          Cyril DellenbachCommunity Manager
          Community Manager
          July 28, 2025

          You can already export at 8K, but if you're talking about displaying the maps inside Painter in 8K, that's currently not in our to do list and it won't be until we have significantly improved performances.

           

          Cyril Dellenbach (Micro) | QA Support Artist | Adobe
          E
          eugene_lukasAuthor
          Participant
          July 26, 2025

          Thanks for the update, we're waiting!

          G
          graphic5FEE
          Known Participant
          July 26, 2025

          Thank you. We are waiting for this update for Painter.
          Another question is, will Painter get the feature in future versions to output in the program at 8k resolution?

          Cyril Dellenbach
          Community Manager
          Cyril DellenbachCommunity Manager
          Community Manager
          July 25, 2025

          For Designer, we now have released our own Path Tracer, so we are no longer dependent on Nvidia and we are indeed moving away from Iray. Don't get me wrong, Nvidia did a great job with Iray, but with our own renderer it will be easier to control and improve our features related to rendering. Also, the kind of problems we're talking about in this thread should not occur if we have the hand on the renderer.

           

          For Painter and as already mentioned, the Iray/5000 serie issue should be fixed in a coming release.

           

          Best regards,

           

          Cyril Dellenbach (Micro) | QA Support Artist | Adobe
          G
          graphic5FEE
          Known Participant
          July 24, 2025

          It is unlikely that Adobe will not update these two programs, Painter and Designer, for this iray renderer. Because this is a big problem and it is expected that such a company will do something to solve this problem as soon as possible. Because currently rendering with CPU is very slow and 50 series graphics should be supported so that everyone can use this.

          RGhost
          RGhost
          Participant
          July 24, 2025

          In last Substance Designer Adobe moving away from Iray.

          (From documentation: "Deprecated This renderer will not receive new features and will be retired in a future version of Designer.)

          So I assume Painter will go that way too?..

          RGhost | veda3d.com
          quicknap
          quicknap
          Participant
          July 23, 2025

          This adobe blog is promoting the use of Substance Painter's support of the new range of GeForce RTX 5090 GPUs which is ironic / absurd because I've found that the Iray renderer within Substance doesn't even recognise the GPU. I'd love to know when Adobe plans to build in this support?

          Thanks ! 

          Cyril Dellenbach
          Community Manager
          Cyril DellenbachCommunity Manager
          Community Manager
          July 21, 2025

          To be fair, it's more or less an Nvidia driver issue with a Nvidia renderer. Now we indeed have to make a decision, no matter where the problem comes from. The standard is currently not the 5000 serie, that's in fact why we took a bit of time before taking a decision.

           

          I personally don't have all details, but we should have a fix for the coming minor release.

           

          Best regards,

           

          Cyril Dellenbach (Micro) | QA Support Artist | Adobe
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