Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] I need help! => Topic started by: cgiout on 2020-05-29, 11:52:54

Title: Layered material with droplets layer
Post by: cgiout on 2020-05-29, 11:52:54

hi.
I need to add to a layered carpaint material an additional layer of water droplets.
Water droplets are obtained by the use of a displacement map.
For what i know displacement is not rendered if used on a material layer but only on the base material.
The workaround to use mix maps doesn't work because displacement must be transparent as water, so what's the workaround for this?

Thanks in advance for any help.
Bests
Raf
 

Title: Re: Layered material with droplets layer
Post by: romullus on 2020-05-29, 12:01:12

Because of transparency/refraction you can't expect this to work on single mesh and/or material. The solution would be to use duplicated mesh - one with regular surface material and another with transparent water material. I tried this setup here: https://forum.corona-renderer.com/index.php?topic=2466.msg158657#msg158657 and it works pretty well, but in the end i prefer scattered mesh droplets.

Title: Re: Layered material with droplets layer
Post by: cgiout on 2020-05-29, 14:26:48

Ok, i'm trying the mesh duplication way.
Do you think that displacement in layered material will be supported some day?

Raffaele

Title: Re: Layered material with droplets layer
Post by: PROH on 2020-05-29, 14:56:00

Hi. The "problem" with displacement in layered materials doesn't have anything to do with the "droplet-issue". The displacement of the mesh will be the same regardless of what layer it's placed in. As long as there's only one mesh, you'll have a hole behind the displaced droplet, and since water is transparent this will be visible.

You can use the displacement method with non-transparent stuff like paint or dirt, but not with transparent stuff like water.

Hope it helps

Title: Re: Layered material with droplets layer
Post by: cgiout on 2020-05-30, 13:43:47

Quote from: PROH on 2020-05-29, 14:56:00

Hi. The "problem" with displacement in layered materials doesn't have anything to do with the "droplet-issue". The displacement of the mesh will be the same regardless of what layer it's placed in. As long as there's only one mesh, you'll have a hole behind the displaced droplet, and since water is transparent this will be visible.

You can use the displacement method with non-transparent stuff like paint or dirt, but not with transparent stuff like water.

Hope it helps

Thank you, i understand.

Tried with the duplicated maeh method and it worked.