Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] Daily Builds => Topic started by: rombo on 2018-06-12, 22:17:54

Title: Corona 2 RC2 - Environment Light issue on regular render vs IR
Post by: rombo on 2018-06-12, 22:17:54: Hi Guys!
There seems to be an issue with the rendering of an interior scene with RC2, as it crops a part of the environment lighting on the top part of the image, in comparison with the IR version of the same image.

Initially I thought it may be a DR issue, but then I turned it off.
Then I tried the production render 1st with UHD cache and then full path tracing, as I thought it may be some lingering bug with the UHD, but apparently it doesn't make a difference with just path tracing, as it appears with both solutions...

I checked with both Coronacam & Physical, same thing.
Doesn't show up with the old light solver, just with the new one (the experimental).

Have a look, I'll make the scene available if you need to check it.
Thanks,
Title: Re: Corona 2 RC2 - Environment Light issue on regular render vs IR
Post by: pokoy on 2018-06-13, 13:48:18: You should state in the topic title or more prominently that it's probably the new light solver. I'm seeing differences in reflections too, and it's quite obvious in non-glossy/blurry reflections, I suppose this is a similar case.

What if you disable reflections on the wall material? Will both versions look more alike then?
Title: Re: Corona 2 RC2 - Environment Light issue on regular render vs IR
Post by: sprayer on 2018-06-13, 17:07:56: IR also is not using UHD and that gives a bit darker image in shadows
Title: Re: Corona 2 RC2 - Environment Light issue on regular render vs IR
Post by: rombo on 2018-06-14, 09:53:15: Hi, thanks for getting back to me, yes, I ended up sorting myself with the default light solver and it rendered with pathtracing+uhd a very similar result. It was the 1st time I had seen the new light solver fail at getting a clean and physically accurate result.

I'll give it a shot without reflection on the wall to see what happens.

I'll keep an eye on further issues with the new light solver.
Title: Re: Corona 2 RC2 - Environment Light issue on regular render vs IR
Post by: sevecek on 2018-06-14, 10:09:35: Could you please send us the scene? It seems like something that should be easily fixable once we are able to reproduce it.
You can use our private uploader (https://corona-renderer.com/upload).
Thank you!
Title: Re: Corona 2 RC2 - Environment Light issue on regular render vs IR
Post by: maru on 2018-06-14, 11:47:47: Quote from: sprayer on 2018-06-13, 17:07:56
IR also is not using UHD and that gives a bit darker image in shadows
Just to clarify: IR is using UHD Cache, unless you disable it by checking "force path tracing" in the Performance tab.
Title: Re: Corona 2 RC2 - Environment Light issue on regular render vs IR
Post by: pokoy on 2018-08-13, 09:28:25: Please, please, please finally add 16 bit TIF output to CIE. It's been requested more often than anything else for CIE, it's been said to be 'coming soon' a few times, it's been in code review since v2 as far as I know and it is a real all-or-nothing feature that shouldn't be neglected anymore. Please...
Title: Re: Corona 2 RC2 - Environment Light issue on regular render vs IR
Post by: Ondra on 2018-10-09, 10:25:08: weird topic choice, but yes, we are sooo close ;) - currently under review
Title: Re: Corona 2 RC2 - Environment Light issue on regular render vs IR
Post by: pokoy on 2018-10-09, 11:08:03: Ah yes, weird I posted about 16b in this topic. You know, once you need to rant, the place and persons involved don't matter, lol.