Chaos Corona Forum

Chaos Corona for Cinema 4D => [C4D] I need help! => Topic started by: PWM-E on 2023-09-30, 13:45:53

Title: Custom material
Post by: PWM-E on 2023-09-30, 13:45:53

Hi.

I am trying to replicate this type of material,( Heat treated )

Coming from octane I would use a dirt map and some tweaking afterwards.

What would be the go-to method in Corona's physical material?

I understand it would not really work on flat surfaces but I have modeled the weld spots on the headers and joints so I believe there is something I can do with high maps

ideally, I want the effect to be around the edges of the welds and on the welds themselves.

The alternative is to make another material and use the WELD displacement map I have also used in the past.



Any help would be appreciated

Title: Re: Custom material
Post by: burnin on 2023-09-30, 17:32:46

You can use "Thin Film" with either "Legacy" or "Physical" materials
More on thread here: "C4D Thinfilm doesn't work anymore with Corona" (https://forum.corona-renderer.com/index.php?topic=38475.0)

Title: Re: Custom material
Post by: PWM-E on 2023-10-01, 13:02:08

Thanks.

I will have a play

Title: Re: Custom material
Post by: davetwo on 2023-10-02, 10:56:38

for localised effects like the weld areas you could try using a layered material with the Corona distance shader as the mask. then use (hidden) geommetry to position weld areas. The weld metal tones can be achieved by using a coloured fresnel shader in the second material.

Title: Re: Custom material
Post by: davetwo on 2023-10-02, 11:05:29

See attached...

Title: Re: Custom material
Post by: PWM-E on 2023-10-02, 12:05:29

Quote from: davetwo on 2023-10-02, 11:05:29

See attached...

Choom That looks like a good base for what I need !!!

Yeah, I tried to use fresnel but it could not find a way to drive the discolorization in localized areas.

But this looks like the one. I will have a go later today and send some previews

Thanks

E

Title: Re: Custom material
Post by: davetwo on 2023-10-02, 20:04:22

Quote from: PWM-E on 2023-10-02, 12:05:29

Quote from: davetwo on 2023-10-02, 11:05:29

See attached...

Yeah, I tried to use fresnel but it could not find a way to drive the discolorization in localized areas.

Fresnel is just a kludge as the colouration of the weld is due to heat/oxidisation not viewing angle. A colourised noise would probably work as instead.

Title: Re: Custom material
Post by: PWM-E on 2023-10-03, 12:19:08

Yeah, this one looks like a good base for the test.

Will have a work with it and post results later

Thanks mate !

Title: Re: Custom material
Post by: PWM-E on 2023-10-03, 15:42:41

Quote from: davetwo on 2023-10-02, 20:04:22

Quote from: PWM-E on 2023-10-02, 12:05:29

Quote from: davetwo on 2023-10-02, 11:05:29

See attached...

Yeah, I tried to use fresnel but it could not find a way to drive the discolorization in localized areas.

Fresnel is just a kludge as the coloration of the weld is due to heat/oxidisation not viewing angle. A colourised noise would probably work as instead.

DUDE. I must apologize in advance but I am so gonna poke you when I get more material questions.

This works so well !!! I still need to weak things but. Ufff