Randomly moving particles in ORBX after export.

[Aleksei]

Hi,
Got another problem with export for RNDR.
I have a (cached) X-Particles system in the scene. And after export to ORBX file it generates somothing which looks like a random rapidly moving particles, which don't supose to be there. While in Live Viewer and Picture viewer the renders look like expected. Please, check the attached images.

In the scene:
- both XP emitters and goemetry used for particles has Octane object tag
- motion blur in the Octane object tags is set to Transform/Vertex(Tried just Transform as well)
- X-Particles are cached, using plugin's cache object.
- particles are generate via assigning geometry in the "Particle Rendering" tab in the Octane object tag.

Render settings:
- screenshot is attached
- also tried increasing the Time Sampling Per Frames to 4.

Please, help with to nderstand what's going on.

P.S. Having this problem from time to time for years. Somethimes ignored it when the artifacts were not very distinct. Sometimes had to render particles overnight on the desktop PC. But never solved it.

Live Viewer render

Octane Standalone render

Render settings

[Aleksei]

Checked the pastprojects and can say that first time I spotted the problem 6 years ago.
Please, check the video: https://vimeo.com/187045553
At the time 00:05 when orange soap stands still you can see small black particles inside of it. This looks as expected. But right after that, when the soap ascends, if you watch carefully, you will see that those particles get a motion blur aligned in random directions. The particles stay at their places, just blurred. And the faster they move (with the soap) the longer these motion blur streaks are.

[Aleksei]

One more screenshot to the collection from another scene.