Can ICE strands have motion blur in Redshift?

Discussions about rendering in SOFTIMAGE©
Pooby
Posts: 495
Joined: 27 Aug 2010, 22:25

Can ICE strands have motion blur in Redshift?

Post by Pooby » 10 Oct 2018, 15:26

Hi, I've made some hair in Redshift, but it doesn't seem to have any motion blur when I render it.
I have tried adding a Strandvelocity attribute. I'm not sure what else to do (apart from switching motion blur on for deformation etc)
Does anyone have any experience or ideas?

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mattmos
Posts: 425
Joined: 02 Dec 2009, 16:59

Re: Can ICE strands have motion blur in Redshift?

Post by mattmos » 10 Oct 2018, 15:42

Hi Paul,
ice strands can be motion blurred just fine (as long as no bugs were introduced recently!) - all you should need to do is define pointvelocity and strandvelocity as attributes.

Some more info from the RS forums:

1) Compute the velocities “manually” in ICE by querying the PointPosition/StrandPosition of the current frame and the previous frame, taking the difference and multiplying by the frame rate, then storing the result in PointVelocity/StrandVelocity.
2) Use the “Strand Simulation Framework” but be aware that there are apparently some bugs in there though they seem simple to work around, see:
https://groups.google.com/forum/#!topic ... LZEvLLjKlQ
and
viewtopic.php?f=4&t=2075&start=20

Pooby
Posts: 495
Joined: 27 Aug 2010, 22:25

Re: Can ICE strands have motion blur in Redshift?

Post by Pooby » 18 Oct 2018, 13:00

Thanks Matt . sorry for the delay in replying