Vellum snow

[tamagochy]

Spent some time to make vellum snow simulation and Karma XPU render. Reflection volume pas Karma CPU.

 

[StephaneS]

Nice work !

[tamagochy]

Change simulation settings

 

[CARLOS ARANGO]

Looking sweet!, would you please share a breakdown of the process a bit more?
I am working on a similar scene, and I'm struggling to get the proper shader effect for the snow and I want to render with Karma XPU and CPU

Your snow and specular is looking great.

I'll greatly appreciate it.

 

Edited April 23, 2024 by CARLOS ARANGO
Upgrade Quality on Sample motion clip

[tamagochy]

For volume I used simple karma pyroshader and render this pass in karma xpu.

For reflections, i cant found solution for XPU yet so I use karma CPU with combination of two pbrreflect one for overal reflection and one for specle. Also I convert volume to mesh for it. For specle I use voronoi noise and samplesphere to randomize normal direction

 

 

[tamagochy]

In karma CPU you can use one shader for snow and use grad field instead normals

 

[CARLOS ARANGO]

Man, this is awesome, thanks a lot for the quick tutorial, I'll test it out!

[cudarsjanis]

On 4/17/2024 at 3:02 PM, tamagochy said:

Change simulation settings

 

This is looking cool! Any tips on how you got that nice snow sim look with vellum as it gets muddy sometimes. Cheers

[tamagochy]

Well, play with friction, attraction weight and point mass until you find nice look. And I think point mass play main role in all of this )

[cudarsjanis]

On 11/5/2024 at 10:08 AM, tamagochy said:

Well, play with friction, attraction weight and point mass until you find nice look. And I think point mass play main role in all of this )

Thanks, Yeah I have masks for attraction weight and using shape match on top of that. Haven't played around with mass too much so will give that a go.

Any chance you could put that scene on gumroad? Could grab it then for some $.

Thank you

[tamagochy]

1 hour ago, cudarsjanis said:

Thanks, Yeah I have masks for attraction weight and using shape match on top of that. Haven't played around with mass too much so will give that a go.

Any chance you could put that scene on gumroad? Could grab it then for some $.

Thank you

Well, I'm thinking about put it to gumroad.

But with recent release of the MPM solver I think it will be better for snow sims. I didnt check it just saw presentation videos )

[cudarsjanis]

2 hours ago, tamagochy said:

Well, I'm thinking about put it to gumroad.

But with recent release of the MPM solver I think it will be better for snow sims. I didnt check it just saw presentation videos )

There's pros and cons as for everything, so I think Vellum approach is gonna be around for a while. Haven't tried MPM myself yet though. Let me know when that script drops on gumroad. I'll check it out then.

Cheers