Glow in the corners

[James_O]

Hello I'm new to Corona,
I've modelled a scene and tried to render it, but for some reason, I see a glow in the corners.
It's as if there are some small light emitters scattered along the edge.


Please help

[johan belmans]

LooKs like light leaks, probably you need some thickness on the walls and ceiling. Add a shell modifier.

[romullus]

And here's article about that in Corona's helpdesk: https://coronarenderer.freshdesk.com/support/solutions/articles/5000516209-i-can-see-noise-in-the-corners-of-my-scene-

[James_O]

Thanx but it's not the geometry.
I've even intersected objects.

[sprayer]

scene near 0.0.0 coordinates?

[romullus]

Can you show UHD cache settings?

[James_O]

Hi I came to work today, and it works fine here)))
Originally I created the model at work (3DS MAX 2018 + Corona 1.5), but at home I have 3DS MAX 2015 + Corona 1.5, so it's probably comparability and export issues.
But thanx for your help anyway

[romullus]

Most likely it's due to the bug that was introduced in 1.5 (fixed in hotfix). Here's how to fix it: https://coronarenderer.freshdesk.com/support/solutions/articles/12000020539-i-can-see-splotches-spots-light-leaks-in-my-image-

[maru]

This should be also automatically fixed if you install Corona Renderer 1.6 hotfix 1 (currently the newest version).

[James_O]

Hello I actually found the fix for this.
In the "performance" tab, the "precision" value was set to 0.5 by default, if you increase it to 2-4 then the issue is fixed.

[maru]

Yes, that's exactly what we meant, however the bug in 1.5 affected some UHD Cache settings which are not exposed to the user. So even setting the precision value high may not fully solve the issue. Please apply the "reset settings" solution, or just install Corona 1.6 hf1.