Jump to content
mrcoolmen

Blur Volume Using Volume Vops

Recommended Posts

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 :)

Share this post


Link to post
Share on other sites

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).

Share this post


Link to post
Share on other sites

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! :D

Edited by CuriousKid

Share this post


Link to post
Share on other sites

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

streaky_volume_bb.jpg

  • Like 1

Share this post


Link to post
Share on other sites

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 by CuriousKid

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×