Chaos Corona Forum

Chaos Corona for Cinema 4D => [C4D] Bug Reporting => [C4D] Resolved Bugs => Topic started by: leo3d on 2018-04-09, 11:23:43

Title: Refraction/Gloss invisble on reflection
Post by: leo3d on 2018-04-09, 11:23:43

Refraction/Gloss invisble on reflection

Title: Re: Refraction/Gloss invisble on reflection
Post by: romullus on 2018-04-09, 11:39:55

Does your mirror material has slight glossiness, like 0,99 or 254/255?

Title: Re: Refraction/Gloss invisble on reflection
Post by: leo3d on 2018-04-09, 12:33:42

Find

Just active Caustic on my light cloth shader

Title: Re: Refraction/Gloss invisble on reflection
Post by: maru on 2018-04-09, 15:16:10

Wait, does it mean that you are using refraction in that material?

Title: Re: Refraction/Gloss invisble on reflection
Post by: leo3d on 2018-04-09, 15:18:00

yes

Title: Re: Refraction/Gloss invisble on reflection
Post by: TomG on 2018-04-09, 15:25:01

But cloth doesn't have refraction... translucency or opacity would be better choices here, surely?

Title: Re: Refraction/Gloss invisble on reflection
Post by: Beanzvision on 2018-04-09, 15:33:35

Can you upload the lampshade material at all?

Title: Re: Refraction/Gloss invisble on reflection
Post by: Eddoron on 2018-04-09, 19:32:15

Inverted normals?

took a few tests but I was able to reproduce it with these settings:

Edit: I played a bit more with the settings and isolated it to the mirror material's gloss being the problem.
The geometry, volume or thin, doesn't seem to play a role. Romullus was right.

Title: Re: Refraction/Gloss invisble on reflection
Post by: maru on 2018-04-09, 20:25:48

Looks like yet another light transport issue. :(
https://coronarenderer.freshdesk.com/support/solutions/articles/5000516180-known-bugs-and-limitations

The best solution in this specific case would be to restrain from using refraction in the lampshade material. Like Tom said, translucency or opacity should be the way to go.