https://www.sidefx.com/forum/topic/84195/

search for Flip Volume loss on odforce or Sidefx's forum, this has been answered many times.

Might be related: https://www.sidefx.com/forum/topic/82674/ including your Houdini version would help.

I never thought I would say this but, what about using metaballs?

You can use drag and/or limit the max force. Pop drag / Pop speed limit

you should be running this code over "Detail (only once)"

you can do that with a gaswrangle node inside DOPs // using height as threshold if(@P.y>chf("max_Y_value")){ f@density = 0; v@vel = 0; } // or anthing outside the water area if(f@surface>0){ f@density = 0; v@vel = 0; }

the vdbsmooth1 node inside the pyrobakevolume SOP is buggy. to fix it, you can convert to volume+volumeBlur and back to VDB.

chramp("ramp",fit01(sin(@Time),0,1),0)*ch("amp") You'll just need to create a "ramp" and "amp" parms (attached example) Notice the extra 0 at the end of the chramp function, that's the first component since you can do vector ramps too how do you find help about hscript? Open a textport and search for ramp: exhelp -k ramp Then get the docs about chramp exhelp chramp ramp_hscript.hipnc

You can check the output of allVoxelsAsString() https://www.sidefx.com/docs/houdini/hom/hou/Volume.html

my_group$OS

rest2 gets created with the gasrest2 node Seems like you forgot to resize the rest fields? Have a look at the attached file. I hard-coded the "Frames between solve" for simplicity but you can keep the expressions. sparse_rest.hip

You can set that on the left side icon and in the preferences The default behavior looks broken IMO.