Crashing when rendering animation

[dfcorona]

I am using Max 2025.3 with Corona 12 Update 1. Works good till you render animation.  Crashes right out of Max. I'm going to downgrade to Corona 12 Hotfix 1 and see if it's to do with the latest Corona.  Anyone else having crashing with latest Corona?

[dfcorona]

Well I rolled back to Corona 12 Hotfix 1, same thing. When you render animation it crashes out of max. Not sure if this is a Corona or Max thing. Will have to try Corona 11 next I guess.

[Avi]

Could it be that the crash is not caused by Corona but by any other plugin which you maybe using in your scene or from any corrupted animated model?

It would be a good troubleshooting step to try to reset enu using this article: https://www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/Resetting-3ds-Max-3ds-Max-Design.html

If the problem persists you can start a ticket and send us the minidump file along with your scene so we can try to reproduce the same crash on our end and provide you a solution.

https://support.chaos.com/hc/en-us/articles/4649117083409-How-to-report-issues-3ds-Max

[dfcorona]

Hi sorry, was gone for the holiday. There was a couple of updates for Forest pro and railclone. I did the updates and will render the animation again to see if they were the culprits.

I'll report back my findings.

[Avi]

sure, feel free to reach out if problem persists.

[dfcorona]

Well unfortunately with work I didn't have a chance to rerender that animation. But now I'm finally rendering a new addition and the same issue, crashes right out of max. I'm thinking this is Max issue, I already have some wired problems with Max 2025.3 like selection issues. I'm going to go back to 2024 and see if the new Max is the problem. 2024 Max I never had any issues.

[dfcorona]

Okay so I tried on max 2025 and 2024 crashes out of max on both. Even tried 2 different computers. I think I narrowed it down to animated Corona cameras. It seems to most definitely be the Corona cameras when they are animated. Not sure which setting in Camera are crashing the scene. When I use anything else or just perspective it renders just fine. Minute I go back to camera CRASH. Just like the other scene file. I think it might have to do with animated DOF Value in the camera. Or possibly Environment & Clipping or animated Environment & Clipping.

I noticed that when I try to use IPR and use the Point selector for DOF Focus Value so I can animate it with Auto Key, it doesn't work right. Doesn't keep the measurements or save a key. So maybe there is a bug in the Corona Camera and that is also crashing the app.

[dfcorona]

I think I figured it out, It seems to be the Corona Camera Motion blur. When activated for Camera and Geometry it crashes during rendering animation out of max. The minute I turned it off it works fine.

[dfcorona]

Well I also found if I add even the Render Element "CGeometry_Velocity" so I can do motion blur in post even that will crash out of max.  There is some bug with anything motion blur with Corona 12 Update 1.

[Aram Avetisyan]

Hi,

If you can provide a simple scene (few simple objects and camera with motion blur, optionally also the velocity render element added) where this can be easily replicated, it will be great.
If reproduced, the crash will be reported straight away.

[dfcorona]

Okay I'll try to create a simple scene, My scene now is complex.

[dfcorona]

Okay I created a simplified scene and sent it to chaos. Request #333313

[Avi]

This issue is logged and has been reported to our devs.

(Report ID=CMAX-1443)

[dfcorona]

Thank you Avi, I got a response and it is indeed a Bug.  I think I found a couple of more bugs for other settings so I will report those also.