Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] Bug Reporting => [Max] Resolved Bugs => Topic started by: rombo on 2015-07-31, 17:46:41

Title: Render blown out as though 80 massive supernovas were placed in a tiny room.
Post by: rombo on 2015-07-31, 17:46:41

Hello,

I am having a nasty problem that is not allowing me to work properly.

On the same scene, with the same camera, with the same lighting setup, I am getting the following results for a render in one room, and for a render in the following room in the same scene, I get a totally blown out image in photoshop (but it appears as almost black in CoronaVFB).
I have a delivery in a few hours which means this is going to be delayed :(

Kindly check out the images, this started happening after I imported some objects in the scene, although I checked for albedo on the imported items and all materials got passed by the corona converter.
Thanks in advance for all your help,
R.

PS: I edited the post and added another example.jpg to show how the black dots start taking over the image in a rather organic fashion around some areas until it all goes black (but with superhigh values in the CoronaVFB, and thus white in photoshop).

Title: Re: Render blown out as though 80 massive supernovas were placed in a tiny room.
Post by: romullus on 2015-07-31, 19:02:41

Moving this to bug report.

Title: Re: Render blown out as though 80 massive supernovas were placed in a tiny room.
Post by: pokoy on 2015-07-31, 19:23:22

Is this max 2016? Because it could have added automatic exposure IF you have a physical cameras in the scene. If yes, disable it.

Title: Re: Render blown out as though 80 massive supernovas were placed in a tiny room.
Post by: rombo on 2015-07-31, 19:44:04

Nope, no physical cameras.
I'll track this on the bug report.

Title: Re: Render blown out as though 80 massive supernovas were placed in a tiny room.
Post by: Ondra on 2015-08-01, 00:18:42

if I have a scene, I can easily fix whatever is causing this

Title: Re: Render blown out as though 80 massive supernovas were placed in a tiny room.
Post by: rombo on 2015-08-01, 00:33:57

You'll find a download link on a personal message,  thank you.

Title: Re: Render blown out as though 80 massive supernovas were placed in a tiny room.
Post by: romullus on 2015-08-01, 08:56:03

Duplicate: https://corona-renderer.com/bugs/view.php?id=1217

Title: Re: Render blown out as though 80 massive supernovas were placed in a tiny room.
Post by: romullus on 2015-08-01, 11:47:52

I've just got those QNAN and INDO pixels myself too. Build jul 29. It was very simple scene, just one plane with displacement. I was doing various tests and suddenly bunch of black pixels infested VFB. Those pixels stuck in same location no matter what. Even after reloading scene. Erasing VFB helped to get rid of them.

Can't reproduce it unfortunatelly.

Title: Re: Render blown out as though 80 massive supernovas were placed in a tiny room.
Post by: rombo on 2015-08-01, 11:50:20

Is there a switch to turn off displacement across the scene?
I'd like to give it a go if it would be possible.
I found out that by turning off ALL my glass things go smooth again (but of course it is useless - we all need a little glass in our lives :)

Title: Re: Render blown out as though 80 massive supernovas were placed in a tiny room.
Post by: romullus on 2015-08-01, 12:06:14

Yes, there is: Render settings>Common parameters>Options>Displacement

Title: Re: Render blown out as though 80 massive supernovas were placed in a tiny room.
Post by: rombo on 2015-08-01, 12:19:04

Well, I gave that a try but it is still happening :(

PS: Found the Culprit - One shelled glass box. For some reason is behaving destructively across the scene. Erased it and now it is fine.

Title: Re: Render blown out as though 80 massive supernovas were placed in a tiny room.
Post by: Ondra on 2015-09-07, 15:35:54

fixed on mantis