CGTalk Lighting Challenge #30: Old school Smoke

Show off your final renders
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Zom-B
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CGTalk Lighting Challenge #30: Old school Smoke

Post by Zom-B » Mon Jan 07, 2013 6:30 am

Here is my final submission for the CGTalk Lighting Challenge #30: Old school Smoke.
The base models where done by Giorgio Luciano.

Image
polygonmanufaktur.de

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cotty
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Re: CGTalk Lighting Challenge #30: Old school Smoke

Post by cotty » Mon Jan 07, 2013 7:41 am

I took a look at the others and... they will have no chance :wink:
little gallery... http://unverzagt.biz/cottysgallery/

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Re: CGTalk Lighting Challenge #30: Old school Smoke

Post by StompinTom » Mon Jan 07, 2013 8:16 am

Nice one! Looks ace!

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Re: CGTalk Lighting Challenge #30: Old school Smoke

Post by Stinkie » Mon Jan 07, 2013 10:23 am

Indeed it does. :)

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zeitmeister
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CGTalk Lighting Challenge #30: Old school Smoke

Post by zeitmeister » Mon Jan 07, 2013 8:19 pm

Wow!
Cheers, David



DAVIDGUDELIUS // 3D.PORTFOLIO
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Bosseye
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Re: CGTalk Lighting Challenge #30: Old school Smoke

Post by Bosseye » Mon Jan 07, 2013 8:57 pm

Stunning! Incredibly atmospheric.

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Polinalkrimizei
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Re: CGTalk Lighting Challenge #30: Old school Smoke

Post by Polinalkrimizei » Mon Jan 07, 2013 11:49 pm

Nice one Zom-B, and good luck for the competition!

I can actually smell this picture.

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Re: CGTalk Lighting Challenge #30: Old school Smoke

Post by PureSpider » Tue Jan 08, 2013 12:06 am

Wie gern würde ich sowas auch können... ich bewundere dich, Arthur!

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Zom-B
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Re: CGTalk Lighting Challenge #30: Old school Smoke

Post by Zom-B » Tue Jan 08, 2013 12:58 am

Hey guys, thanks a lot for the kind words :)

I share two nice "techniques" that I used to create that picture:

The Smoke (The credits for this one goes to fused since it was all his idea ^^)

The smoke was created using 3 what is called "Sweep-Nurbes" in C4D. Its a modifier that creates a object out of two splines, one "rail" and one for the thickness.
So we use here a rail spline based on a Helix with tight swirl radius on the bottom and wide on the top.
The spline for the thickness is a longer shape with some irregularities.
This smoke mesh is kind of low poly and gets smoothed out by Indigos subdiv, the smoke material is also kind of simple.
screenshot.1.png
The smoke mesh
screenshot.2.png
Two splines that a smoke swril is made from.
screenshot.2.png (3.64 KiB) Viewed 5949 times
screenshot.3.png
The smoke material
The Caustics
I played around quite a long time to get some proper caustics for that glass, but I failed with each approach.
Until I had the idea of a "laser-pointer", that should only bring out the caustics but don't lit the scene further.
So I created a IES file that was kind of a bundled beam of light and shot it into the glass to get fancy caustics.
I decided to have a little broader beam, so the caustics don't get ultra sharp, I felt that would disturb the choosy atmosphere.
Finally I realized that rendering the scene took way to long and the caustics needed ages to clear out. This seems to be related to Indigos importance weighting of lights. If I would render 5 light-sources individually for 1h and merge them in PS together, the resulting image would be way cleaner then rendering all of them together for 5h!
So I rendered the whole scene without the "IES lightbeam" and did the laser beam solo and merged it in PS.
smoke_7_nur caustics.png
Render of only IES light beam only
polygonmanufaktur.de

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CTZn
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Re: CGTalk Lighting Challenge #30: Old school Smoke

Post by CTZn » Tue Jan 08, 2013 1:16 am

Fine techniques really, and a great image !
obsolete asset


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pixie
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Re: CGTalk Lighting Challenge #30: Old school Smoke

Post by pixie » Tue Jan 08, 2013 6:31 am

Zom-B, you cheater! :P
Great work!

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fused
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Re: CGTalk Lighting Challenge #30: Old school Smoke

Post by fused » Mon Jan 14, 2013 11:45 pm

Beautiful work!

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Re: CGTalk Lighting Challenge #30: Old school Smoke

Post by pixelmonkey » Fri Jan 25, 2013 10:54 am

Absolutely amazing, bravo!

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RusGun
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Re: CGTalk Lighting Challenge #30: Old school Smoke

Post by RusGun » Wed Feb 06, 2013 5:11 am

Nice work! Can you tell about that how you make greys parts of sigars? And can you share your settings and placement of lights in scene?

PS Вы ведь русский ? Модель Имрода была победителем на Dominance War, на сколько я помню)
Ommm

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