I'm only able to see motion blur in the live viewer, but not in the picture viewer upon final render.
I'm using an xpGenerator with a polygonal sphere underneath to generate the particles. I've also applied an Octane object tag to the xpGenerator. Caching doesn't seem to make any difference either.
I'm using C4D R20, X-Particles build 895, and Octane 2020.2.3-R3. I've experimented using older versions of each of these but I still can't get motion blur to show up in the final render.
Sample C4D project file to see how things are set up:
https://drive.google.com/file/d/1hMsHyG ... sp=sharing