mrcoolmen Posted June 25, 2017 Share Posted June 25, 2017 Hey, I'm Curious how to blur a volume with Volume Vops? I know i can use "volume blur" nodes but i'm hoping to isolate a region to blur the volume. Thank you so much for your time to ans my question in advance Quote Link to comment Share on other sites More sharing options...
merlino Posted June 25, 2017 Share Posted June 25, 2017 You can also convert the volume to vdb and use de smooth vdb node, where you can plug a mask for the blur effect (the mask should also be a vdb volume). Quote Link to comment Share on other sites More sharing options...
CuriousKid Posted August 3, 2017 Share Posted August 3, 2017 (edited) Hello! I found this topic and think it's best to post here instead of creating another topic about blurring volumes. What I'm trying to do is blurring the volume according to its velocity grid. At the moment I've managed to mask the areas I want to blur withe the Smooth VDB node, but is there a way to blur the volume directionally? Like baking the motion blur in the grids that I want to avoid writing the velocity grids in my vdb file. Thanks in advance! Edited August 3, 2017 by CuriousKid Quote Link to comment Share on other sites More sharing options...
bran_daid Posted August 3, 2017 Share Posted August 3, 2017 howdy! using the vdb advect sop in conjunction with the solver sop would perhaps give you the result you're looking for. the vdb advect sop uses the velocity volume to push around a vdb, which can be averaged over arbitrary timesteps to give you a blur effect. streaky_volume_bb.hip 1 Quote Link to comment Share on other sites More sharing options...
CuriousKid Posted August 3, 2017 Share Posted August 3, 2017 (edited) Thanks for the answer Brian! I'm still a bit of a newbie on Houdini (less than a year of real work on it), and your hip file is very useful! I'm looking into your hip file and testing on a basic billowy smoke, but for the moment it doesn't recognise my velocity grids (vel.x, vel.y and vel.z). What I've found is that pyro sims usually create three grids for the velocity, so to match what you did I would need to merge them in a single vector float VDB if that's right. I'll try to find myself, but if you have an idea on how to do that, that would be awesome too. --------------------------------------------- EDIT --------------------------------------------------- OK, editing, because I forgot that there's a VDB vector merge node just for that haha Edited August 3, 2017 by CuriousKid 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.