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Hello is there a way how to render motion blur or use motion vector pass for freezed simulation?

Posted: Wed Oct 22, 2025 5:31 pm
by Ofcourse
Hello, I have scene with X-Particles which is cached but I am using just specific frame to freeze it for the whole timeline, where only one thing which is animated is camera... Is there a way how to get motion vectors from that static scene for the freezed particles? Just to see the motion vector on that "freezed particles"? I have seen this in some game using N-Vidia Photo Mode. So I am not sure if something similar is achievable on render engine. Please let me know :) If you know.

Re: Hello is there a way how to render motion blur or use motion vector pass for freezed simulation?

Posted: Mon Oct 27, 2025 11:56 am
by ChrisHekman
We support the motion blur data for x-particles when it exists. Which I believe should always exist when rendering in the PV.
Let me know if this is not the case.

The live viewer might not always show them when scrubbing the timeline.

Re: Hello is there a way how to render motion blur or use motion vector pass for freezed simulation?

Posted: Mon Oct 27, 2025 12:14 pm
by Ofcourse
Hi Chris, thank you for your reply. I do understand that you support motion blur of cached X-Particles. My question was about motion blur being applied just on one frame for the whole time (that frame is set in the cache object... So before this step the animation was for example 100 frames long with motion blur working fine as expected, but when I set specific frame being used from that cache obviously the motion blur does not work because it struggles the lack of before and after frame to make the motion blure from. Do you have an idea how to apply the motion blur at that specific frame?

Re: Hello is there a way how to render motion blur or use motion vector pass for freezed simulation?

Posted: Sun Dec 14, 2025 7:27 pm
by Ofcourse
Hi this post's getting older but I need help or advice how to render motion blur on particles which are already cached in motion and over bunch of frames... But I want this cached animation being just at specific frame (freezed) that is ok, I know how to do it all good. But the motion blur does not work no more as it worked when the cache wasn't freezed... When I hover the timeline and stop at selected frame, motion blur is visible in the Octane Viewport and this is what I would like to see with that cache freezed. To animate just camera in the scene having the simulation freezed with motion blur applied...

Re: Hello is there a way how to render motion blur or use motion vector pass for freezed simulation?

Posted: Mon Dec 15, 2025 12:00 pm
by bepeg4d
Hi,

I think you need at least two frames to store the motion data.

ciao,
Beppe