Author Topic: Bright spots in rendering  (Read 5781 times)

2014-11-03, 15:44:00

Kristoffer Andersen

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Hi. I did a render of a low-poly surgical lamp, and noticed two artifacts in the image. 1 small pixel-artifact (which I've experienced before) and the yellow halo on the background. Im not sure if it's an artifact, but the material on the wall has rounded corners enabled, but there are no edge at that point; the models are intersecting eachother. That render is actually 3800 passes..



« Last Edit: 2015-01-19, 14:51:06 by maru »

2014-11-03, 17:07:04
Reply #1

Ondra

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Is the wall/ceiling slightly glossy?
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2014-11-03, 21:24:46
Reply #2

Kristoffer Andersen

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Yes! I believe the wall has a glossiness of about 0,7 and somewhat grey-white reflection color so that's correct and I believe the ceiling has very very low reflectivity/refl. glossiness settings..

2014-11-03, 22:16:18
Reply #3

Ondra

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then this behavior is most likely normal - since the normal changes smoothly at the ceiling, it is picking some highlights from the scene
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2014-11-04, 00:25:18
Reply #4

demmi

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if u dont tell me i would never find that artifact LOL
if was my image i would go to photoshop =) you have a good eye
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2014-11-04, 04:21:33
Reply #5

borisquezadaa

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I thought for a moment that had a dead pixel.
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2014-11-04, 11:33:05
Reply #6

Kristoffer Andersen

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I re-rendered a few passes of the same view, but disabled all reflection and rounded corner-settings on both shaders. Seems to me the problem still presents itself? Also, you can see how the two objects intersects..



OT: What sites do people usually upload images from on this forum? Im not used to BB code bus afaik I cant upload images straight from my PC?

2014-11-04, 11:58:45
Reply #7

romullus

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OT: What sites do people usually upload images from on this forum? Im not used to BB code bus afaik I cant upload images straight from my PC?
You can use forum attachments system for that. Look under text input field whan typing new post.
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2014-11-04, 12:03:32
Reply #8

Kristoffer Andersen

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I use glasses but apparently I'm still blind; Thank you, sir!

2014-11-04, 13:12:35
Reply #9

Ludvik Koutny

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That looks like leak. There's a tiny gap between the geometry. Just seal it by moving verticles so the two objects or faces overlap.

2014-11-04, 15:50:45
Reply #10

Kristoffer Andersen

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That's what I tried to pinpoint in the image I posted; the faces already do overlap. The ceiling the one in seethrough shading (alt+x) and the other is the beam.

2014-11-05, 11:12:27
Reply #11

Ludvik Koutny

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Using Rounded corners feature by any chance?

2014-11-05, 21:21:49
Reply #12

Coronaut

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cap holes if there is any(only if you have open polygons) if that doesn't sort this problem out try adding shell modifier to the ceiling if it's plane...

2014-12-08, 18:03:49
Reply #13

Ondra

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ok, the single pixel is probably some random reflection and is therefore normal. The light leaks - could you send me the scene? https://corona-renderer.com/upload/
Rendering is magic.How to get minidumps for crashed/frozen 3ds Max | Sorry for short replies, brief responses = more time to develop Corona ;)