Just an image done in KS4

[Gavrik]

dual-layer material trick

[snooky_rock]

what is that ?!

[Gavrik]

This is my test try to make patina. I used 2 layers of 1 mm from each other. Bottom layer material is gold. For the top layer, I used the transparency map. Maybe someone knows a better way to do this?

[fario]

I think your picture is very well done.

Bravo!

it's post-production with Photoshop?

Antoine

[Speedster]

You might want to test layers more like 0.25 mm or less?  Then, if seen on an angle, there would be less shadow distortion.
Bill G

[Gavrik]

Image in the first post is render without any post-production. Two pictures in second post - photos. Trick with two layers nice works when I have simple surfaces. But if I have a lot of complex surfaces? I will need to duplicate each. Not very convenient.

It would be better to have 2 layer material.

[Speedster]

Don't forget- Each layer has two surfaces, and you can UV map each side of each layer.  2 layers = 4 surfaces.
Bill G