Glass material and Layered or blend material.

[cullylad]

Hi all.
I'm trying to add fingerprints and lipstick marks to wine glasses and when using Corona layered material or blend material the glass gets really dark. I've tried using rayswitcher but refraction is still way off. Is this a bug. I've bodged it by using refraction colour combined with diffuse but it's not right. Any ideas?

[Njen]

Maybe I'm missing something, but why can't you use a CoronaMix map in the glossiness slot between your clean and dirty glossiness values using an image mask? No need for a layered material...

[romullus]

Corona refractive materials doesn't play well inside layered/blended/multi-subobject materials, that is well known bug (likely to be fixed in upcoming 1.5).
As Njen correctly stated, you should be able to solve it with mix/composite maps in single material.

[maru]

He probably wants to add stains with completely different material (like diffuse + bump, etc). It's a pretty problematic bug, you can read about it here: https://coronarenderer.freshdesk.com/support/solutions/articles/5000516180-known-bugs-and-limitations

Hopefully it will be fixed soon.

[Njen]

I've been able to create 'combined' single materials by using a mix map on every input using the same mask (Tom G has one of my test scenes with an example of this). Though this only works if the inputs you want to use are all exposed.