jon3de Posted August 1, 2016 Share Posted August 1, 2016 Hi, I have a whitewater simulation which I converted to a vdb volume. Is it possible to render a vector pass out of this vdb ? I want to blur my whitewater pass in Nuke as I don´t get proper motion Blur while rendering it in mantra. I tried it with import the velocity to an image plane but this works only for normal geometry. With vdb volumes I did not had luck for now. I would be thankful for some ideas. Jon Quote Link to comment Share on other sites More sharing options...
Skybar Posted August 1, 2016 Share Posted August 1, 2016 If you want to render a volume with motion blur, you also need a velocity volume. 1 Quote Link to comment Share on other sites More sharing options...
jon3de Posted August 1, 2016 Author Share Posted August 1, 2016 Thank you David for this hint. I created an additional velocity volume. What do I have to do to tell mantra that it should use this for motion blur calculation? Quote Link to comment Share on other sites More sharing options...
Skybar Posted August 1, 2016 Share Posted August 1, 2016 It works exactly like geometry and attribute "v". But instead of polygons you have a density volume and a velocity volume. So enable MB as you normally would and it should work fine. Quote Link to comment Share on other sites More sharing options...
jon3de Posted August 1, 2016 Author Share Posted August 1, 2016 Ah right. I scaled the values a little bit now I can see the effect. Thank you very much David. Anyway do you know how its possible to render out a 2d Vector pass to blur it in comp ? Or is this generally not a good idea to blur volumes in comp? Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.