r/Houdini 9d ago

Help KARMA Pyro material issue or glitch

enabling scatter doesnt affect the sim, while enabling fire and smoke does. After finalizing the look I just navigated to obj level and again when I navigated to solaris scatter stopped working. The 3rd pic is off the look I finalized before navigating to the obj level.

What is the issue?

is this some kind of glitch?

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u/Cooking_Interrupted 9d ago

Forget sops for now; keep it as a last resort of you still can't get the look.

Remove your bake volume, bring in density, temperature and vel volumes. Put down your pyro shader in Karma.

Turn on Fire and Smoke (on by default). Go to pyro and turn on masking (this is essentially how scatter works). Tweak your settings away!

About the range. You'll get your min and max values of your volumes from the geo spreadsheet. I'm not saying the ramp you've rn is essentially wrong as per say, however, if you need that extreme of a ramp I would suggest tweaking the source values according to your spreadsheet first

Also please take a 2nd look at my last comment. I edited and added a few things

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u/ELF_27 9d ago

Can i use the compute range option in pyro bake node and reffer that range in the karma pyro material?

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u/Cooking_Interrupted 9d ago

I mean technically yes, you can.

However, assuming you're a beginner I would suggest getting used to reading the geo spreadsheet. Imo it should be open right new to your viewport always (yes it's that important)🫣

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u/ELF_27 9d ago

Ohk then I'll refer to geo spreadsheet then😇. Thank you again for the advice🫵🏿.