Coating material tests

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OnoSendai
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Coating material tests

Post by OnoSendai » Thu Nov 29, 2012 10:49 am

Thought I'd make a new thread for test renders.

First off:
Interference from a thin coating, where the coating thickness is controlled with an FBM shader.
The substrate material is a somewhat rough metal.
All the rainbow colours come from light interfering with itself as it passes through the dielectric coating, which is a few micrometres thick.

A bit similar to one of Etienne's materials: http://www.indigorenderer.com/materials/materials/1065
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interference coating.jpg

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Re: Coating material tests

Post by OnoSendai » Thu Nov 29, 2012 12:03 pm

Using a more accurate interference model plus turbulence noise:
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interference coating turbulence 3.jpg

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Re: Coating material tests

Post by pixie » Thu Nov 29, 2012 12:31 pm

Owesome ono is awesome! :o

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Re: Coating material tests

Post by OnoSendai » Fri Nov 30, 2012 2:47 am

Another one, with tweaked interference code:
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coating1.jpg

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Re: Coating material tests

Post by Zom-B » Fri Nov 30, 2012 3:50 am

I'm looking forward to play with that coating feature!
Only thing that kind is quite scary here is the SDS noise after 31min and 2500 samples/px -.-'
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Re: Coating material tests

Post by OnoSendai » Fri Nov 30, 2012 4:07 am

Yeah I'm not sure if the noise is a problem with the new coating material or not. Seems like it may be.

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Re: Coating material tests

Post by Pibuz » Mon Dec 03, 2012 3:29 am

The coating material is looking cool!
I see it reproduces some kind of rainbow-y effect on the surface it is applied to: is it something depending from a specific parameter? For architectural mats I'd use coatings for varnished floor mainly, but they don't have such rainbows :lol:

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Re: Coating material tests

Post by Zom-B » Mon Dec 03, 2012 3:41 am

Pibuz wrote:I see it reproduces some kind of rainbow-y effect on the surface it is applied to: is it something depending from a specific parameter? For architectural mats I'd use coatings for varnished floor mainly, but they don't have such rainbows :lol:
That test have some special ISL code in the coating that creates that effect, its not per default mate!
"Simple" coating looks like that: http://www.indigorenderer.com/forum/vie ... 37#p119037
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Re: Coating material tests

Post by Pibuz » Mon Dec 03, 2012 3:47 am

..OPS! And I had already seen that! :lol: :lol: :lol:
Sometimes you guys can forget my questions.......... :?

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Re: Coating material tests

Post by OnoSendai » Mon Dec 03, 2012 8:51 am

Hi Pibuz,
The thin-film interference will be optional - it will be a checkbox on the coating material UI.

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Re: Coating material tests

Post by OnoSendai » Wed Dec 05, 2012 6:33 am

Testing absorption in the coating.
The red colour comes from the absorption of non-red light as light passes through the coating layer.
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coating_with_absorption.igm
(1008 Bytes) Downloaded 195 times
coating_with_absorption.jpg

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Re: Coating material tests

Post by OnoSendai » Wed Dec 05, 2012 6:44 am

Here's the thin-film coated metal:
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interference_coating.igm
(1.36 KiB) Downloaded 185 times
interference_coating.jpg

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Re: Coating material tests

Post by OnoSendai » Wed Dec 05, 2012 6:45 am

Make sure you have 3.6.2 installed if you want to try out the above materials!

http://www.indigorenderer.com/forum/vie ... =1&t=12056

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Re: Coating material tests

Post by CTZn » Wed Dec 05, 2012 9:13 am

OnoSendai wrote:Testing absorption in the coating.
The red colour comes from the absorption of non-red light as light passes through the coating layer.
To put it in other words, the material underneath the coating is a grey metal. Gorgeous.
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Re: Coating material tests

Post by OnoSendai » Wed Dec 05, 2012 12:08 pm

Doing a bit of work on getting the coating material going with transparent substrate materials.

Coating material over diffuse - diffuse-transmitter blend can be used to create quite a nice 'fast-SSS' material:
Attachments
coating_diffuse_transmitter_test2.jpg

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