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ever sense I have been using the new LTS version or a newer version of blender its not loading the render kernels or sometimes it will but its just painfully slow even with the default cube scene has anyone else running into this problem and fixed it

im running the optiX on a Nvidia 2070

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  • $\begingroup$ That should be a one-time process, but it may happen again on a driver upgrade or a new version of blender. $\endgroup$
    – Allen Simpson
    Jun 23, 2021 at 22:37
  • $\begingroup$ I move back and forth between 2.93LTS nd 3.0Alpha, and I must say, despite the described expected behavior, I've had Render Kernels take nearly 10 minutes to load, despite having done so an hour previous (all that changed was I cleared my system cache, I think) - same thing every time - long wait, memory use increases slowly, then quickly, then goes back down a little, then it loads. Sometimes blender goes its "not responding" grey color during this period (sometimes not) but almost always recovers - just after a good amount of time. $\endgroup$
    – Christopher Bennett
    Jun 24, 2021 at 0:16
  • $\begingroup$ @ChristopherBennett Noticed weird hickups too. Nvidia have released new drivers lately so it could be linked to that $\endgroup$
    – Gorgious
    Jun 24, 2021 at 6:44
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    $\begingroup$ I also noticed it was sometimes extremely slow even after loading the render kernels. Manually unchecking and re-checking viewport denoising checkboxes forced another "loading kernels" loading time, then it worked like before $\endgroup$
    – Gorgious
    Jun 24, 2021 at 6:46
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    $\begingroup$ I just upgraded to Alpha 3.0.0 for another reason. The kernels took an age to process first time round, but now it loads them instantly - even after restarting Blender. From what I understand that was always how it was supposed to be - it just didn't work for some. $\endgroup$
    – squaregoldfish
    Sep 17, 2021 at 20:09

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