Beauty rendering black. Black dots appearing...

Hi, I need help. I have a problem with one scene. It is saving with black beauty pass, all passes are there. Imgur: The magic of the Internet
I’ve rendered this scene 3 times, 3 times bug appears.
What I tried to do.

  • Delete render setting and create new.
  • Changing depth in render save.
  • Delete all lights and put new ones

During rendering I see the beauty and I can save it…

The scene was created on beta, and finished at commercial version.

Can I composite the beauty using the direct, indirect etc.?

Gear: Windows 7 x64, 64GB RAM, Dual Xeon. Latest hotfix installed, R18 Studio

Please help, I have to pass this project to the client, rather quick :frowning:

I found the way, just linear doge add the direct, indirect, reflect, refract and translucency. But I noticed something strange too, black dots at render output.

Hi!

Could this be an issue with NaNs (those black dots in the image)? That way when you turn on bloom and glare, it will make the output black.

Hi! Thank you!

I’ve turned off bloom & glare and rendering once again. We will see what I will get.

I’ve make another render turning off bloom and glare. The beauty saved correct, it is not black anymore.
But the BLACK DOTS, are still there…

Imgur

Yes, the black dots are issues with the rendering core. If you are able to share the scene with us, it would help us in fixing the issue.

Uploading it now :smiley: It is a little bit heavy, but in 2hr it will be uploaded via dropbox.

Thanks looking forward to solve this :smiley:

Scene uploaded!

I’ve got the same problem. The black dots are copious and in some areas of the render they make a big black square.

I’ve got Corona Render 3 Hotfix 1 and try the render in two different machines. Unfortunately I can’t upload the scene, because it’s a client project.

thanks
Lorenzo


Are you also using bloom and glare for post processing? If so, switching it off should solve this.

I don’t use the Bloom and Glare. I post the screenshot settings. I saw this problem when I calculate the High Resolution Image: 5000pix the major side
The Cinema release is the R19

Thanks





For me it is not solved the problem. Here is crop from 8k render. Imgur: The magic of the Internet I have to deal it with Photoshop.

Same issue in my render :

EDIT:
Peew! There is more:

Anybody?

I have to submit any ticket? I’ve sent a scene and nobody didn’t answer. I cant pass the renders to my client. Please help get rid of black dots…

Hi, I’ve actually been looking at your scene for the post few days but still haven’t been able to find why it’s happening or how to get rid of them. The tests I did, everything starts off perfectly and then at around pass 8-9 they appear. I still plan on looking through it again today, another user had the same issue and ended up reverting back to a previous build just to finish the job. Hopefully, a solution is near! :wink:

Thank you for an update, I sure that the rolling back to the beta 1 will solve the problem. But I also think that if there is any bug in paid render engine it should be fixed. We’re paying the sam price as 3ds max users, and the product seems to be a little bit unfinished.

I hope you will find as muc bugs as you can and release HOTFIX ASAP :smiley:

I didn’t forget about this topic. I have one more scene with bug to discuss :smiley: But keep it one by one :stuck_out_tongue_winking_eye:

I´ve a similar problem with the first interior scene with the new commercial version of corona.
In the tests it occured two times that the BEAUTY suddenly turned black :(…!!!
In one of these cases I could use the saved CXR (I defined in the settings that corona saves a CRX every 30min) and resume…

I had some further tests without this problem, so I set up the scene to render overnight…I waited during first 5-10 passes, all was ok so I went away…
In the morning, after 13h of rendering the Beauty-pass was BLACK again :((((((. (I don´t want to imagine such result within a tight deadline) …but the render was still running, producing next (black) passes(?)…so I tried to change something in the post-settings in VFB and after unchecking curves / LUT and Bloom&Glare suddenly I had a Beauty-pass again but absolutly splotchy (not a typical rendering noise) and black spots …when checking / unchecking this 3 options the Beauty turned again black, then again to the splotchy version and so on…:((((…
This time the saved CRX were not usable, as I defined that corona holds only the last 5…and all these were corrupted (splotchy and black dots, please see the both screenshot -zoom-ins), probably all 5 saved after the “black-moment”…after same passes of resume the black spots were still there, so I canceled all this…

Is there something that should be avoided till all is fixed?..Curves, LUT, B&G?
I can wait for the Hotfix, no problem, but if I should continue to use Corona for client work, I can´t risk to have a black image after an overnight render session…and I agree with Niedzviad that it´s a little disappointing that there are more problems with paid version then with Bata…I also have some other smaller isssues that did not occure in Beta like no main image when saving as PSD file (only other passes) etc…

I also consider to work with Beta next months till such problems are fixed…Will Beta then be still running (with the comercial licence I´ve from Version 3) after the oficial Beta-phase ends in some days?

Thanks, Artur


There are two things happening, just to summarize

  1. NANs are appearing in the render. This is where calculations have broken down, and they show up as black dots (if you right click on them in the VFB, rather than show numerical values, they will say NAN or Not A Number). These are always errors in the Corona code someplace.

  2. If a NAN appears anywhere in a render, the Bloom and Glare pass will turn the entire image black. Disabling Bloom and Glare will prevent the entire image being black, but will not remove or prevent the NANs.

Thank you Tom!

I understand…
So which solution do I have? Can I have some kind of influence to avoid these Nans?
I will probably test the scene in Beta too (I hope Beta can open a file from version 3?)…If the problem doesn´t occure, can I still use Beta with the FairSaas-Licence from Corona 3?

Thanks…:slight_smile: !