Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] Bug Reporting => [Max] Resolved Bugs => Topic started by: herbap on 2013-04-01, 16:04:14

Title: light streaks / bug?
Post by: herbap on 2013-04-01, 16:04:14

light streaks under the window... is this bug or caustics?

Title: Re: light streaks / bug?
Post by: Ondra on 2013-04-01, 16:16:42

Is the material glossy? Try disabling glossiness/bump. I don't know where the light is coming from, but it is possible it is just some reflected light. I would need to see the scene to be sure

Title: Re: light streaks / bug?
Post by: herbap on 2013-04-01, 16:41:30

a sun and several corona lights...
with white material, no light streak, send the scene via http://corona-renderer.com/upload/

Title: Re: light streaks / bug?
Post by: Polymax on 2013-04-01, 19:08:34

Maybe it's "Crazy Bump" (bump >>>1)?

Title: Re: light streaks / bug?
Post by: Ondra on 2013-04-04, 16:05:43

ok, I went over the scene, and it seems like it is caused by a combination of factors:
- extreme bump value (44)
- extremely low bump filtering value (0.01)
- using reflection further increases bump strength
- using very skinny triangles causes self-intersections

I won't fix this now, but I'll save the critical part of the scene (the 2 offending polygons) for later, when I'll try to deal with selfintersections in more general way