Jump to content
yeteatime

Smoke Sim- vel not coming through?

Recommended Posts

Hi! Houdini beginner here.

I created a custom velocity using pointVOP and added onto VDB surface attrib point.v as vel. When I middle-mouse click, it shows that vel exists. I have it scaled higher than 0 on the volume source in the DOP network and set "Add" for the operation option, but it makes no difference in the smoke sim. There's supposed to be a noise pattern in the velocity, but it's only taking into account of gravity. If I disable the gravity, nothing happens to the volume (the volume surface get steppier? but it doesn't push the smoke or anything). There's also a custom temperature going into DOP, but that one works fine. So I think I missed a step somewhere when bringing the velocity into the DOP network.....What am I missing? 

Thank you!!

Share this post


Link to post
Share on other sites

could you post scene? kinda hard to say whats wrong with out looking at it.

Share this post


Link to post
Share on other sites

hello!

I made a few changes, I changed the vector type to displacement/velocity/acceleration. The reason  it wasnt working was the source volume was set to v (on volume source dop), but it should have been vel to match the vdb : )

hope this helps

 

smoke_sim_vel_mystery_fixed.hipnc

Edited by ejr32123
  • Like 1

Share this post


Link to post
Share on other sites

Ohhh!!!!! Ahhh you are a life saver :) I was struggling for like hours x.x Thank you so much!

  • Like 1

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

×