ICE Particle Volume Shader and Motion Blur

[ActionArt]

I've been experimenting with the ICE volume shader a lot and one thing I have never been able to get it to do is motion blur. Here is an example. The tire smoke behind the car should be blurred but isn't. I've tried everything I can think of. Does anyone have experience with this? I've experimented with the motion blur samples in the shader and tried every type of motion blur available in MR but it just ignores it.

Thanks for any help!

[Hirazi Blue]

Just to rule out the obvious: Are you using a cached pointcloud (like you should)?

[ActionArt]

Yes, I cached the point cloud and I'm pretty sure I did it right. I'll take another look. Thanks.

[ActionArt]

Now I'm really confused. There seems to be several ways of caching particles, none of which produced the desired results yet. When I use the cache manager in the animate or ice menus it works fine on playback and scrubbing but the volume renderer refuses to work on it at all (renders a blank). The caching in the Environments/Simulation Time Control seems to have no effect on rendering (which is what I was using).

There seems to be a ICE node for caching as well but I haven't got it to work yet.

Any insight on how to cache this correctly for rendering?

[ActionArt]

Has anyone successfully used motion blur on the particle volume shader? Just so I know if I'm wasting my time or not trying to figure this out

[ActionArt]

I FINALLY figured out how to make motion blur work with the particle volume shader. Here's the trick for anyone who might be interested:

1) Cache Particles - this is in the documentation

2) Turn OFF scanline for primary rays! (Raytrace ONLY) - this is what I was missing and doesn't seem to be in the documentation.

Now it works perfectly and fairly fast.