Chaos Corona Forum

Chaos Corona for Cinema 4D => [C4D] I need help! => Topic started by: davetwo on 2025-01-06, 13:12:56

Title: SSS dark lines :( combine 2 materials?
Post by: davetwo on 2025-01-06, 13:12:56

Halloo. I have a hand model which has one material for the skin and another material for the nails. They are added via polygon selection tags. Unfortunately having two SSS materials means I get the dreaded dark lines at the seams.

Do you know how I can combine the two materials into one to avoid getting the lines?
There are no opacity masks to use in the layered material shader unfortunately.

Title: Re: SSS dark lines :( combine 2 materials?
Post by: Beanzvision on 2025-01-13, 14:33:23

Maybe this thread will help? https://forum.corona-renderer.com/index.php?topic=22359.msg137525#msg137525

Title: Re: SSS dark lines :( combine 2 materials?
Post by: davetwo on 2025-01-14, 12:18:44

Hmm - doesn't seem to without painting out SSS areas :(. Will there ever be a fix for this? Its been a very long time since the first reports

Title: Re: SSS dark lines :( combine 2 materials?
Post by: maru on 2025-01-16, 16:44:57

Here is one possible solution:
Use Volumetrics in a Corona Physical Mtl instead of SSS or Skin Mtl.
Then go to development/experimental stuff ( https://support.chaos.com/hc/en-us/articles/4528469959953 ) and disable the "use material-based medium resolving" option. It should work fine as long as the different materials are assigned to a single object (it is not split into multiple separate objects).