Houdini KARMA - Cloud Rendering pt2

Following on from Part 1 this video goes into more depth on how the Karma Pyro Shader works and how to use it on the USD stage to render beautiful cloud vdb's.
Check out the collaboration I did with Action VFX and grab yourself some high quality cloud vdb assets for your next project!
Action VFX Cloud Assets:
www.actionvfx.com/3d/cumulus-...
Learn Cloud Simulation in Houdini:
www.breakyourcrayons.com/houd...
HDRI Download:
polyhaven.com/a/table_mountai...
Sam Krug VFX Channel
/ @samk9632
www.breakyourcrayons.com/
00:00 Basic Cloud Material
05:56 Custom Cloud Shader
07:47 Controller Setup
10:28 Density Modulation
13:31 Anisotropy Modulation
17:52 Secondary Anisotropy
20:34 Ramp & Noise Masks
25:18 Reduce Anisotropy Noise Hack

[@lewistaylorFX]

Just to clarify the extinction-falloff, it's not modulating the density by ray depth.
It is adjusting the extinction coefficient, biasing the falloff of energy, in a dance with the bounce limit + the start level.
In plain terms, it is biasing the energy falloff that should occur inside the medium, and producing brighter values where you'd
normally need 50-100 volume bounces to achieve. It is a non-physical hack.

[@spectrewashere]

Masterclass! Thanks for this.

[@VFX4DESIGN]

Thanks for sharing some great tips here.

[@maksimfilipovich]

love it

[@Zerefthedark]

Thank you soo much for this !!!,I have a small doubt tho, is there a way to render multiple render nodes in karam like we can do it with mantra where we can chain all of them and click on last one and it will render all the render nodes together ????

[@breakyourcrayons]

I’m pretty sure this is possible but you have to set it up in TOPs I believe. I know we did this in production. I’ll have to chat to a friend of mine and see how he did it 👍🏻

[@Zerefthedark]

Ohhh ok thank you soo much for this info, tbh I kinda really used to that feature 😅,​@@breakyourcrayons