ShkYo30 Posted January 19, 2021 Share Posted January 19, 2021 Hi guys, I've already an objects rigid body simulation in a file cache. But I forgot to transfer v and w attributes in the output part of the RBD Bullet solver, and I need them to render with a motion blur in Redshift... How can add a velocity to my objects after the file cache ? Because the simulation take hours and I try to don't recalculate it ! Can you help me please? Thanks in advance! Quote Link to comment Share on other sites More sharing options...
Foxhound Posted January 19, 2021 Share Posted January 19, 2021 (edited) Trail Sop -> compute velocity -> Redshift Rop -> enable Motion blur on the other hand you could do it with volumes but this method should suffice. Edited January 19, 2021 by Foxhound Quote Link to comment Share on other sites More sharing options...
ShkYo30 Posted January 19, 2021 Author Share Posted January 19, 2021 1 hour ago, Foxhound said: Trail Sop -> compute velocity -> Redshift Rop -> enable Motion blur on the other hand you could do it with volumes but this method should suffice. Hi! Well, with the Trail sop, I can see the v values in the spreadsheet, but Redshift doesn't render motion blur! I've all enable (motion blur, mesh deformations blur and instances/particles blur) and nothing happen! What's the problem? I don't understand, if I've velocity I can have motion blur normally... Just another precision, all my objects (rigid body balls) come from a copytopoints after a popnet. And my birth rate isn't the same all the time, it changes and fall to 0 after 30s of animation, is it a problem for the final motion blur? Any idea? Quote Link to comment Share on other sites More sharing options...
Foxhound Posted January 19, 2021 Share Posted January 19, 2021 Ok, what you could do is check the redshift tab of your geo (obj level), there should be a checkbox for motionblur, especially one to use with the v attribute. then inside the redshiftrop check out if you have the tick on on motionblur to use the v attribute. Alternatively send a screenshot of your settings both in the RS geo tab and RS Rop. Quote Link to comment Share on other sites More sharing options...
ShkYo30 Posted January 19, 2021 Author Share Posted January 19, 2021 32 minutes ago, Foxhound said: Ok, what you could do is check the redshift tab of your geo (obj level), there should be a checkbox for motionblur, especially one to use with the v attribute. then inside the redshiftrop check out if you have the tick on on motionblur to use the v attribute. Alternatively send a screenshot of your settings both in the RS geo tab and RS Rop. I think all is enable (see the screen shots), and I need to use "mesh deformations blur from v attrib" to have a motion blur, but it's not accurate, some objects are blurred even if they don't move (I checked few objects that doesn't move during at least 5 frames!). How can I have a "real" motion blur ? And thanks a lot for your help! Quote Link to comment Share on other sites More sharing options...
Foxhound Posted January 20, 2021 Share Posted January 20, 2021 there's a couple of ways to do "realistic" motionblur. Some factors depend on shutter start/end and the shutter center. but maybe this link can help you 1 Quote Link to comment Share on other sites More sharing options...
ShkYo30 Posted January 30, 2021 Author Share Posted January 30, 2021 Sorry for this late answer... Finally I used "mesh deformations blur from v attrib" even if it's not a "real" motion blur, but it's a good compromise, I don't any time to rebuild a new scene ! Thanks a lot for your help ! Quote Link to comment Share on other sites More sharing options...
Foxhound Posted January 30, 2021 Share Posted January 30, 2021 No worries mate! Sorry for not being a great help to begin with lol Quote Link to comment Share on other sites More sharing options...
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