Houdini cuts simulation when try to loop


#1

So i have a problem and i tried many things to solve this but i dont find it by myself.

Sometimes when i loop a simulation in houdini it cuts the simulation from some sides.
Before the looping everything is okay!

simulation%20cut
like this

thats how i loop the simulation(if this is important)
simulation%20cut1

i tried to change the bounds things in the rezise countainer but it never works with max bounds on or off.
simulation%20cut2 simulation%20cut3

i miss something and i dont know what :frowning:


#2

Can you share a .hip? Maybe you’re using the Make Loop SOP in a wrong place? It should be after DOP import (i.e. at the very end of the pipeline)


#3

sure, here u have it!
https://www.file-upload.net/download-13653920/firetests.hip.html

simulation%20cut5
simulation%20cut4

thats my setup

if i make a new geo folder to load in the filecache its the same


#4

Why heat and not density in your bound field?


#5

Well, you are trying to blend volumes with different bounds. You can fix for current project in 3 ways, as i see:

  1. delete resize container and create simulation in full bounding box.
  2. blend not from 1 to 64, but from 25 to 89 for example. In other words, when your bounds in volumes don`t differ so much
  3. You can try copy your small volume to new with bounds of biggest volume first and after that blend it

#6

I had the same problem and added a Volume Resize Node between the first Time Shift and the two branches that get mixed
image