bunker

you can use the partition SOP for that: random_groups.hiplc

You'll need to use Python for that. You should get most of it working with a few steps: - create an empty subnet - copy all the parms from the OTL to your subnet with parmTemplateGroup uiparms = sourcenode.parmTemplateGroup() destinationnode.setParmTemplateGroup(uiparms) - copy all the nodes from your OTL to your subnet with hou.copyNodesTo() - to copy the keyframes, you have parm.keyframes() and parm.setKeyframes() hope that helps

You could transfer the volume density to the grid with the attributeToVolume SOP, or volumesample() in a wrangle.

you have to use prim groups instead.

on the /geo1 object, go to the Render tab/Geometry and turn on "Render Polygon Curves As Subdivision (Mantra)"

have a look a this thread, that should help

Also don't expect FLIP to preserve volume, it just doesn't do that. The particles are added or removed based on the surface field - that's only a rough estimate and the volume loss becomes worse the more frames and/or substeps you have. This old masterclass explains some of the concepts of FLIP https://vimeo.com/15571778

there are 2 hscript functions: rbg() and hsv() if you open a textport, type: exhelp rgb

https://www.sidefx.com/forum/topic/49968/?page=1#post-225812

this is what I get in the mantra render, I even downloaded the file from the forum just in case. check that the file : /tmp/volume.bgeo.sc exists on disk.

you can extract the Hue of the colors with rgbtohsv and plug that float value into a ramp check the attached HIP cop_remap_color.hiplc

To get color with the sparse pyro, you'll need to source/resize/advect. source : Volume source: add Cd resize : Advanced/Resizing/Extra Fields: Cd advect : Advanced/Advection/Extra Fields: Cd check the attached hip file sparse_pyro_color_01.hiplc

I attached a simple example you'll need to write the volume to disk so Mantra can sample it at render time. volumesample.hiplc

you can use "volumeSample"

https://entagma.com/guest-tutorial-looping-flower-petals/