Forums Solaris and Karma Motion blur of point instances in karma

Motion blur of point instances in karma

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willh
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Hi, im trying to get motion blur on instances. When I use a copy to point without packing the motion blur works, but its very heavy, when i pack the geo the motion blur stops working.

Is this a know limitation of karma?
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robp_sidefx
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Hi William, do you have a hip file you can share?
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willh
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Hi, here is a simple file.

I have checked out the prebuilt karma rop setup and it seems like using the cache works. It would still be great to use velocity blur on the instances.

Attachments:
no_MB_on_packed_instances.hip (528.8 KB)

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robp_sidefx
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Thanks, this is perfect. There are two different ways I immediately thought I could make this work, but neither is actually doing what I expect, so let me dig a bit deeper.
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willh
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Awesome thanks
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jarenas
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I stumbled today with this issue... Instance Velocity Blur doesn't seem to work as expected yet for copied packed instances done in SOP. Any news on this and recommended workflow?
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robp_sidefx
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Sorry, I really dropped the ball there in terms of not following up. There isn't a great solution for native instances here. Your options are, in the Scene Import node, to either unpack the geometry or use a point instancer.
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jarenas
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robp_sidefx
Sorry, I really dropped the ball there in terms of not following up. There isn't a great solution for native instances here. Your options are, in the Scene Import node, to either unpack the geometry or use a point instancer.

Thanks Rob, I decided on using the Point Instancer and then I stumbled with the same color import issue into instances exposed on the other thread hehe... always learning (specially in Solaris)!
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mzigaib
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Just check here if there is any option to have blur on point instances, I have a bunch of RBD rocks with v attribute and SOP imported to Solaris as point instance or else is too heavy to handle but I can not get velocity blur, any tips?
https://vimeo.com/user2163076 [vimeo.com]
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robp_sidefx
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If you haven't already, make sure to enable Instance Velocity Blur on the Karma Render Settings.

Demo hip file attached
Edited by robp_sidefx - 2026年6月25日 04:48:51

Attachments:
blur.hip (480.6 KB)
blur.png (419.1 KB)

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