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When I render a scene that uses motion blur with optix, there are randomly rectangles/sections where it skips straight to the background. Its random and only exists in some frames, and does not appear when using cuda. The object it appears on (or near) has motion blur disabled.

Optix with Motion Blur:

optix

Optix without Motion Blur:

optixnomb

Cuda with Motion Blur

cuda

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  • $\begingroup$ Hello and welcome, this sounds like a bug and should probably be reported. This is Q&A site run by volunteers, we are not programmers nor in any way associated with the Blender Foundation, decision making nor development process of the software. For bug reports please see Where to Report a Bug $\endgroup$ May 25, 2023 at 22:29
  • $\begingroup$ I'm guessing it's an issue with Blender rather than something I've messed up then right? $\endgroup$
    – Diana G
    May 25, 2023 at 22:30
  • $\begingroup$ Yes, it looks that way. Hard to say for sure, but that doesn't seem like desirable behaviour in any case $\endgroup$ May 25, 2023 at 22:34

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