cgcris Posted August 12, 2014 Share Posted August 12, 2014 Hi guys, I have fluid sim that has been meshed with vdb. I would like to have some motion blur on my render, but still haven't managed to get it working. I can see there is "v" data on the mesh, and I've also an tried "attribute transfer" the velocity from the original cached particles. Also, "Geometry Velocity blur" is turned on, and "Allow motion blur" is on in the mantra node. Any ideas how I can get this working? thanks, Cris Quote Link to comment Share on other sites More sharing options...
Jason Posted August 12, 2014 Share Posted August 12, 2014 It sounds like you've done everything necessary. I can only think you're accidentally rendering from the wrong ROP or something? Or your render-flag is on the wrong SOP (something without v)? Quote Link to comment Share on other sites More sharing options...
cgcris Posted August 12, 2014 Author Share Posted August 12, 2014 Hi Jason, thanks for your reply, I've just wacked the shutter speed up and I am finally seeing something. cheers!! Quote Link to comment Share on other sites More sharing options...
anim Posted August 12, 2014 Share Posted August 12, 2014 make sure your camera is not scaled Quote Link to comment Share on other sites More sharing options...
mightcouldb1 Posted August 13, 2014 Share Posted August 13, 2014 Also worth noting that you can multiply the velocity (i.e. v*=2) if you would like to get more velocity blur out of the particles. You can even animate this if you are so brave... Also if you post your hip file, we can examine the problem in more detail Quote Link to comment Share on other sites More sharing options...
Guest tar Posted August 13, 2014 Share Posted August 13, 2014 (edited) thanks for your reply, I've just wacked the shutter speed up and I am finally seeing something. Sounds like you turned up the shutter opening time - the opposite of turning up the shutter speed Edited August 13, 2014 by tar Quote Link to comment Share on other sites More sharing options...
cgcris Posted August 13, 2014 Author Share Posted August 13, 2014 Sounds like you turned up the shutter opening time Yep that's right, should have said shutter speed value up! which is the same as you rightly point out to leave the shutter open for longer. Also if you post your hip file, we can examine the problem in more detail Thanks for your help and tip on multiplying the velocity, I would love to upload it's just too big to even attempt it. cheers, Cris Quote Link to comment Share on other sites More sharing options...
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