Hello, please I have fast camera movement (and particles) and I am using the Motion Blur LOP. I attached a simplified node graph.
If I use only the File Cache node, the Motion Blur is corrupted in the render. If I disable the filecache and let Karma get its samples directly from the SOP Import LOP, the Motion Blur is fine.
Is it technically correct to use the Cache LOP node and reference the camera shutter times manually (because the Camera Primitive is not present when caching the particles?)
Using a cache and setting the shutter time should be equivalent as far as I understand. You can always dive inside the motion blur lop and see exactly what it's doing.
I'm intrigued as to why the motion blur isn't working when you cache to disk though. Is it an issue of not saving enough time samples? Usually for particles you would render with velocity blur, in which case you don't need to worry about time samples as long as you have velocity on your points.
