Octane Tag Particle Rendering Bug - Motion Blur Scales-Up Instead of Blurring
Posted: Tue Nov 10, 2026 4:38 pm
Hello! I export particles from Houdini and import them into C4d as Particle Groups, and I've been running into some limitations regarding particle rendering. Namely, I'm forced to choose between two workflows: Cloner set to multi-instance pointed at a Particle Group vs. Octane Particle Rendering on the Octane Object Tag.
The Cloner Workflow is the best one since it uses all the most useful attributes correctly: id, velocity, color, orientation, scale. However, it's pretty darn slow at higher particle counts (100k's and Millions).
Experiments with the Octane Object Tag are more efficient and promising, but there's a major limitation with motion blur, and it appears to be a bug:
Instead of blurring particles, those particles are scaled. Weird! I have provided all relevant files, images of the discrepancy when compared to the correct render using the Cloner workflow, and specs of the software versions and machine used.
This post was written by me, but the tests, logs, and folder were done/written by Claude. But don't worry. I've dealt with this for years and have looked over everything. I'm confident this is the issue. (To the best of my knowledge)
P.S. I'm also pretty sure there's issues with particle death, but that's not outlined or described, here.
Ok, love you, bye.
The Cloner Workflow is the best one since it uses all the most useful attributes correctly: id, velocity, color, orientation, scale. However, it's pretty darn slow at higher particle counts (100k's and Millions).
Experiments with the Octane Object Tag are more efficient and promising, but there's a major limitation with motion blur, and it appears to be a bug:
Instead of blurring particles, those particles are scaled. Weird! I have provided all relevant files, images of the discrepancy when compared to the correct render using the Cloner workflow, and specs of the software versions and machine used.
This post was written by me, but the tests, logs, and folder were done/written by Claude. But don't worry. I've dealt with this for years and have looked over everything. I'm confident this is the issue. (To the best of my knowledge)
P.S. I'm also pretty sure there's issues with particle death, but that's not outlined or described, here.
Ok, love you, bye.