Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] Bug Reporting => [Max] Resolved Bugs => Topic started by: Polymax on 2014-01-09, 21:39:43

Title: Fireflies on CoronaLight mat in constant mode on thin geometry
Post by: Polymax on 2014-01-09, 21:39:43

Why appears fireflies on CoronaLight material in Constant mode on thin geometry? This is shader core limitations? Because scene don't have GI.
(https://dl.dropbox.com/s/34sgurfum5dw058/ScreenShot00794.jpg)

Title: Re: Fireflies on CoronaLight mat in constant mode on thin geometry
Post by: Ondra on 2014-01-09, 22:33:40

Are those NaNs/INFs? can you send the scene?

Title: Re: Fireflies on CoronaLight mat in constant mode on thin geometry
Post by: Polymax on 2014-01-09, 22:55:08

Quote from: Keymaster on 2014-01-09, 22:33:40

Are those NaNs/INFs? can you send the scene?

Scene uploaded - "1389304489_CoronaConst.rar"

PS. please disable "shell" modifier

Title: Re: Fireflies on CoronaLight mat in constant mode on thin geometry
Post by: Ondra on 2014-01-14, 00:21:35

yep, this is the traditional problem with selfintersections/leaks. Your geometry near the corners is extremely elongated, so there are some numerical issues. Setting embree triangles to precise seems to be helping with this scene a lot.