Sparkling Snow Shader... how to make it?

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Sparkling Snow Shader... how to make it?

Postby djart » Tue Oct 28, 2014 1:15 pm

djart Tue Oct 28, 2014 1:15 pm
Hello,

im am looking for a "sparkling" snow shader or some help to build one.

The snowshader should "sparkle" like snow if light falls on it from different angles.
I dont have any idea on how to realize it with octane/ c4d. For AR3 i have some nice snowshaders... but it has to work in octane.

Thx for any help,

djart
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Re: Sparkling Snow Shader... how to make it?

Postby rodross » Tue Oct 28, 2014 2:38 pm

rodross Tue Oct 28, 2014 2:38 pm
I'd be interested in how to do this as well
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Re: Sparkling Snow Shader... how to make it?

Postby gregoryhamoui » Thu Apr 09, 2015 8:01 pm

gregoryhamoui Thu Apr 09, 2015 8:01 pm
hello,
me too please :)
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Re: Sparkling Snow Shader... how to make it?

Postby djart » Fri Apr 10, 2015 10:15 pm

djart Fri Apr 10, 2015 10:15 pm
Already found a solution by using a normal map.

I attached the file for tesing purpose only, cause the metallic texture is found on the internet somewhere.
It was taken from some whitepaperstuff, but cant remember the source anymore. If someone knows it, please drop a note.
Attachments
snow_sparkle.rar
(553.15 KiB) Downloaded 897 times
snow_shader.jpg
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Re: Sparkling Snow Shader... how to make it?

Postby dotcommer » Sun Apr 12, 2015 9:54 pm

dotcommer Sun Apr 12, 2015 9:54 pm
So I thought i'd try to take a stab at this.
No bitmap textures. All noise and displacement from C4D/Octane. Its unfortunately very slow to render (this frame was about 4min.), but I think its fairly close to actual snow. I've included my project file for others to mess with. If you get a better result in a faster render time, please post it for us to see!

I have a mix material with a base snow texture made up from a specular material with absorbtion medium, transmission, and a very high roughness, and a specular material for the snow's spec with a voronoi noise in the specular channel. The mix material has a noise displacement.

Here's my result:
Octane_Snow_v03.jpg

Octane_Snow_v02.jpg
Attachments
Octane_Snow_v03.c4d.zip
(104.99 KiB) Downloaded 1217 times
Download my free Octane resources!
Paper Lantern | Fresh Snow (C4D Only) | Keyboard Displacement Texture | Solar Panel Texture

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Re: Sparkling Snow Shader... how to make it?

Postby ten » Mon Apr 13, 2015 1:48 am

ten Mon Apr 13, 2015 1:48 am
not bad dc!
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Re: Sparkling Snow Shader... how to make it?

Postby djart » Mon Apr 13, 2015 6:20 am

djart Mon Apr 13, 2015 6:20 am
Nice results and approach dotcommer, lets see how to get it render faster.
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Re: Sparkling Snow Shader... how to make it?

Postby dotcommer » Tue Apr 14, 2015 1:22 am

dotcommer Tue Apr 14, 2015 1:22 am
I came across this post recently while searching for ideas for a snow shader:
viewtopic.php?f=6&t=41740&hilit=Snow

The result is incredible, but unfortunately it seems the person who made it has fallen off the face of the earth. :( Site is suspended, and no contact info. Damn shame, that snow (and lava on the next page) are incredible.
Download my free Octane resources!
Paper Lantern | Fresh Snow (C4D Only) | Keyboard Displacement Texture | Solar Panel Texture

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Re: Sparkling Snow Shader... how to make it?

Postby cleanerxx » Tue Apr 14, 2015 4:31 am

cleanerxx Tue Apr 14, 2015 4:31 am
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Re: Sparkling Snow Shader... how to make it?

Postby brasco » Tue Apr 14, 2015 11:35 am

brasco Tue Apr 14, 2015 11:35 am
dotcommer wrote:unfortunately it seems the person who made it has fallen off the face of the earth. :( Site is suspended, and no contact info. Damn shame, that snow (and lava on the next page) are incredible.


He's still around as Cleanerxx says, they handled the transition to masteringcgi.com.au very badly, so there are no redirects in place (super simple to setup too...)
He actually made the snow shader in Octane whilst researching how to do it in Vray, results are fantastic as usual.


cheers
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