Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] Bug Reporting => [Max] Resolved Bugs => Topic started by: Rimas on 2017-11-01, 11:13:41

Title: Black dots...again :)
Post by: Rimas on 2017-11-01, 11:13:41

Hi, everyone!

1.7 is here and so are fresh new problems xD

Here's a video showing what's going on with Corona: LINK (https://youtu.be/iVTW_QTLJE8)

A rundown:
I'm getting black dots that appear to be spawning from one window, at the corner, and affecting the reflections that have anything to do with the window. Corona VFB cannot save the beauty pass (saves white) and blacks out in a few seconds (the only way to see the beauty pass again is to switch to the reflection pass and back). There also appears to be a square area around each dot, 48x48 pixels in total, that will not respond to denoising at all (visible in the video once I crank up the contrast in PS).

This was an overnight render that I left chugging at work. The test renders I made before this one didn't have this problem, everything was fine. The only thing I changed, as far as I remember, was the resolution. Since I couldn't save the beauty pass I had to piece 16 screenshots together in PS....blah...

ANy ideas what could have happened?

Title: Re: Black dots...again :)
Post by: sevecek on 2017-11-01, 11:47:21

Hi,

It's most likely a problem of the new experimental light solver. Disabling it should fix the issue.

Title: Re: Black dots...again :)
Post by: Rimas on 2017-11-01, 11:58:05

Hmm, I had it on the test renders (which rendered fine) and same here... I'll try without it and see if that changes anything.

I remember having black dots after installing new versions if I don't reset Corona settings (change renderer and back). I did in this scene, but I had another scene open and rendered beforehand (which I didn't reset the settings for). The older scene rendered fine, but this one then didn't. Could Corona somehow f*ck up itself on a newer file if an older one is opened beforehand?

Title: Re: Black dots...again :)
Post by: Philip kelly on 2017-11-07, 11:53:28

Any update on this as it's still appearing in all renders, interiors that is.

Phil

Title: Re: Black dots...again :)
Post by: sevecek on 2017-11-07, 14:58:28

Quote from: Philip kelly on 2017-11-07, 11:53:28

Any update on this as it's still appearing in all renders, interiors that is.

Phil

Have you tried unchecking the "New light solver (experimental)" checkbox?

Title: Re: Black dots...again :)
Post by: Philip kelly on 2017-11-07, 15:17:00

Ah No.

Can I ask were that is located, I can't find it.


Woods for the trees so to speak.

Thank you

Philip

Title: Re: Black dots...again :)
Post by: TomG on 2017-11-07, 15:24:58

Here's where to find it, in the Performance tab (it's unchecked by default)

Title: Re: Black dots...again :)
Post by: Ondra on 2017-11-10, 15:19:05

Hi,
did the unchecking help? also we did some fixed here, are you using portals?

Title: Re: Black dots...again :)
Post by: maru on 2017-11-28, 17:41:02

We have just released Corona Renderer 1.7 Hotfix 1: https://corona-renderer.com/download/
It contains some important fixes, including "black dots" issues.

If the issue will remain after installing this version, please contact us, and we will continue looking for a solution.

Title: Re: Black dots...again :)
Post by: Ondra on 2017-12-16, 20:54:52

hopefully fixed with the hotfix