Chaos Corona Forum

Corona Renderer for 3ds Max => [Max] I need help! => Topic started by: Jpjapers on 2021-11-22, 18:16:39

Title: Iridescent/Metallic glass shader
Post by: Jpjapers on 2021-11-22, 18:16:39
Has anyone got any thoughts on how to make a glass shader similar to the attached image?
Im thinking theres some mix of glass, thinfilm and maybe a metal shader but im struggling to find the right balance or create something physically plausible.
I believe its glass but its been coated inside with a metal of some sort.
Title: Re: Iridescent/Metallic glass shader
Post by: James Vella on 2021-11-22, 19:28:37
If you are talking about the bottom 2 spheres, then this is called Dispersion. In the legacy material its 1 below Refraction.
Title: Re: Iridescent/Metallic glass shader
Post by: Jpjapers on 2021-11-22, 22:59:49
If you are talking about the bottom 2 spheres, then this is called Dispersion. In the legacy material its 1 below Refraction.

Ill have a go thanks. Im not 100% sure that its dispersion it looks to me like a coating
Title: Re: Iridescent/Metallic glass shader
Post by: romullus on 2021-11-22, 23:27:05
It looks like a job for the Siger's thin film texmap. https://www.sigerstudio.eu/sigertexmaps-thinfilm/
Title: Re: Iridescent/Metallic glass shader
Post by: Jpjapers on 2021-11-22, 23:47:58
It looks like a job for the Siger's thin film texmap. https://www.sigerstudio.eu/sigertexmaps-thinfilm/

Yeah ive got that and had a play around with it. Its sort of halfway between metal and glass which is where im getting stuck because obviously its physically possible but im not sure how to make that physically based in corona (v6)
Title: Re: Iridescent/Metallic glass shader
Post by: James Vella on 2021-11-23, 09:21:20
It looks like a job for the Siger's thin film texmap. https://www.sigerstudio.eu/sigertexmaps-thinfilm/

+1

I really do love Sigers plugins.
Title: Re: Iridescent/Metallic glass shader
Post by: cjwidd on 2021-11-24, 01:42:20
Use Siger thin film on a glass shader and then add roughness to the coat layer in the new Physical Material Shader, or create a layered material to add the dust / dirt.

For all intents and purposes the reference image shows, basically, a "dirty bubble" shader.
Title: Re: Iridescent/Metallic glass shader
Post by: romullus on 2021-11-24, 10:18:28
I don't think thin film texmap can be successfully used with Corona physical material, at least not in a way it's intended to. I think you need to use legacy material, which of course doesn't have clear coat.
Title: Re: Iridescent/Metallic glass shader
Post by: TomG on 2021-11-24, 14:18:23
My experiments back during the dailies of 7 when I wanted to know how this kind of look would be handled with the new Phys Mat suggests using the Absorption in the Clearcoat (basically, an extra coating of some sort of oil-like material on top of the base glass). Just remember that the clear coat colors everything beneath it, so don't make the colors too strong (else it will start to look like colored glass :) ).

I thought this was shown somewhere but I can't find it, so here's the scene re-opened and screengrabbed, I think with some playing it would give the desired kind of effect.