Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] Bug Reporting => [Max] Resolved Bugs => Topic started by: pokoy on 2014-04-11, 18:55:42

Title: A6 minor bug - pixel-wide top row artifact in renders
Post by: pokoy on 2014-04-11, 18:55:42

Not a big deal but may be an issue especially with spherical rendering.

The topmost row of the image (only one pixel wide) is brighter than the rest of the image. Not sure when and why it happens but I see it in every render here.

Title: Re: A6 minor bug - pixel-wide top row artifact in renders
Post by: Ondra on 2014-04-11, 19:05:20

Can you post an example image? I dont see anything like this. But I had a problem with one column of pixels being too white after resizing an image in photoshop. The raw input image did not have this problem.

Title: Re: A6 minor bug - pixel-wide top row artifact in renders
Post by: pokoy on 2014-04-11, 21:10:12

Sorry, no image right now. I was rendering against a map in screen mode set as background, so it's maybe happening only when you render with the background map being visible in the top area of the image.
Hope this helps.

Title: Re: A6 minor bug - pixel-wide top row artifact in renders
Post by: Ludvik Koutny on 2014-04-11, 23:23:54

I had the exact same problem... but with mental ray :) Screen mode too... i was doing some CG integration into footage. So maybe it's more of a 3ds Max bug than Corona's...  but at the same time, i think it would be possible to fix from Corona's side :)

Title: Re: A6 minor bug - pixel-wide top row artifact in renders
Post by: Ondra on 2014-06-22, 22:01:58

ok, looks like 3dsmax issue.

Title: Re: A6 minor bug - pixel-wide top row artifact in renders
Post by: Ondra on 2014-06-22, 22:15:06

Actually, upon closer inspection, this is caused by 3dsmax filtering. I can work around it, so now it should not happen for bitmaps with blur set to 1 or lower.