Author Topic: (blown) Snow on ice shader  (Read 6690 times)

Offline Tangled-Universe

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(blown) Snow on ice shader
« on: December 02, 2010, 02:18:14 PM »
Just made this quickly to incorporate into a scene I'm working on.
It's a watershader with a density function, followed by a surfacelayer which adds slight cracking.
Then the snow is added.
Pretty basic, but still 23 nodes already...

By the way, the red thing is a 1m sphere to asses transparency etc.

Cheers,
Martin

Offline dhavalmistry

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Re: (blown) Snow on ice shader
« Reply #1 on: December 02, 2010, 02:32:24 PM »
good work but I think the ice needs to be more reflective.....
"His blood-terragen level is 99.99%...he is definitely drunk on Terragen!"

Offline Tangled-Universe

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Re: (blown) Snow on ice shader
« Reply #2 on: December 02, 2010, 02:34:32 PM »
good work but I think the ice needs to be more reflective.....

Yeah I was a bit in doubt about that already. It's at 0.5, so I'll try 0.7 for starters.
Thanks :)

Offline inkydigit

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Re: (blown) Snow on ice shader
« Reply #3 on: December 02, 2010, 02:48:49 PM »
you'll not get that ball back before spring!
nice to see higher res when this is completed!
keep up the good work Martin!

Offline Tangled-Universe

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Re: (blown) Snow on ice shader
« Reply #4 on: December 02, 2010, 02:49:14 PM »
On the other hand...I think upping reflectivity for this type of ice is perhaps not so good.
My aim is a bit like this:
http://lh3.ggpht.com/_WYRS9pNKNsM/Rk6j2_0RLLI/AAAAAAAAAcU/Iwsb89KTt6c/s912/113%20Tioga%20Pas%20bevroren%20meer%20langs%20de%20weg.jpg

Offline Tangled-Universe

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Re: (blown) Snow on ice shader
« Reply #5 on: December 02, 2010, 02:49:34 PM »
Thanks Jason :)

Offline Tangled-Universe

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Re: (blown) Snow on ice shader
« Reply #6 on: December 02, 2010, 04:27:24 PM »
Here it's partially in action in a small crop of the image it will finally be used in.
I inverted the crack profile, because I just find it cooler :) lol
Dhaval, the reflectivity is 0.1 here. Still pretty reflective I suppose. What do you think?

Offline dhavalmistry

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Re: (blown) Snow on ice shader
« Reply #7 on: December 02, 2010, 04:44:06 PM »
yes its weird.....I guess we miss the blur reflection feature....but its looking very good
"His blood-terragen level is 99.99%...he is definitely drunk on Terragen!"

Offline Tangled-Universe

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Re: (blown) Snow on ice shader
« Reply #8 on: December 02, 2010, 04:45:53 PM »
yes its weird.....I guess we miss the blur reflection feature....but its looking very good

It's not that weird I think. The first image I posted has a camera facing downwards, as the latest crop faces a bit upwards.
This hugely influencess the result of reflections.

Offline Tangled-Universe

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Re: (blown) Snow on ice shader
« Reply #9 on: December 02, 2010, 11:51:13 PM »
With some snow...getting somewhere now...


Offline dhavalmistry

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Re: (blown) Snow on ice shader
« Reply #10 on: December 02, 2010, 11:54:20 PM »
oh that extreme displacement is killing my eyes and the image ;)

coming along good....the snow still needs some "wet" look....and perhaps some specular highlights on ice?
"His blood-terragen level is 99.99%...he is definitely drunk on Terragen!"

Offline dandelO

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Re: (blown) Snow on ice shader
« Reply #11 on: December 02, 2010, 11:58:30 PM »
Really convincing, looks great. I like the edge blending of the snow layer on the flat ice. Cool!

Offline Tangled-Universe

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Re: (blown) Snow on ice shader
« Reply #12 on: December 03, 2010, 12:04:40 AM »
oh that extreme displacement is killing my eyes and the image ;)

coming along good....the snow still needs some "wet" look....and perhaps some specular highlights on ice?

Ghehe yeah...you caught me there...occasionally these show up unfortunately.

I'll see what I can do about the speculars. The surface is quite smooth and lacks rough features which would facilitate specular highights.
I even doubt if blown snow would have such a wet and shiny look, guess not.
Really convincing, looks great. I like the edge blending of the snow layer on the flat ice. Cool!

Thanks :)
Fun thing is, is that I got smooth patches like in my very first picture, but that those patches where displaced as well by the cracks.
So I inverse blended the voronoi with the PF which makes the patches, adjusted the breakup and coverage a bit unusual and then this was the result :)

Offline Gannaingh

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Re: (blown) Snow on ice shader
« Reply #13 on: December 03, 2010, 12:08:41 AM »
Daannnng! Those last two are awesome! I love the lighting, shading, and reflectivity. Too bad about the exploded geometry though.

Offline Oshyan

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Re: (blown) Snow on ice shader
« Reply #14 on: December 03, 2010, 02:46:08 AM »
Looking really nice, aside the exploded geometry. I know what you're doing this for and I think it's a good idea. ;D

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