Hmm.. am I the only one that noticed that with latest Corona build the interactive is really slugish? When I have material editor opened it’s even worse. I don’t know what’s wrong with that but IMO every new version of corona the interactive is becoming slower.
The scene isn’t complicated. It’s just single object with bunch of lights.
Could you share an example recording showing the issue and a comparison with Corona 12 HF1?
I am asking because we are investigating some performance issues, but before I share anything I would first like to see what exact kind of “sluggishness” you are getting.
Oh, I reverted everything back to 12 HF1. Everything is fine now. It was like few ms lag on everything, orbiting, moving mouse, changing values.
Please, send the scene (or better the scene with the recording), so we can have a look at it.
If it is not found and resolved, it will most probably stay there and become an inconvenience later on.
If you are getting this kind of viewport lag/stutter for example when panning or rotating, it is most likely a 3ds Max 2025 issue. It happens with any renderer, even when Corona and V-Ray are uninstalled. I was also unable to reproduce it in 3ds Max 2024. This is already reported to Autodesk.
If you are getting something else, please do let us know. As Aram said, a scene and a video demonstrating the issue would be perfect.
i was using max 24 - its not a max 25 issue. definitely a corona issue.
Hi Devs
3 videos comparing 07.30 daily, 10.23 daily and Corona 12HF1. You can see the FPS difference. On the latest daily, even on my other monitor, things like youtube start to stutter which indicates to me it interferes with the GPU somehow?
All in all, the latest dailies are much slower - the IR buckles the PC (not just corona).
Thank you for the videos! We will see if we can reproduce a similar issue. Is there a chance you could share your scene with us?
I cant sorry - however i can confirm it does it with all scenes.
You mean even in very simple scenes? I’m on Max 2024 as well and i have no such issues with Corona 13, including latest build. Maybe it’s processor, video card, particular Windows build? It’s probably worth to provide as much info as you can.
I am getting a similar kind of slowdown in IR when the denoising is set to Intel GPU AI. Maybe related to GPU age/drivers?
Majeranek maybe try disabling it and report back!
I was unable to reproduce this. If anyone is having similar problems, please let us know here.
Ryzen 3900X
RTX 4070
3ds Max 2024
Default render settings (Optix as the IR denoiser)
V12 HF1:
23.10 V13 daily:
Same performance here when IR denoiser is changed to Intel.
I use a TR - could it be that?
(continuing in support ticket 307305)
I did notice slowdowns when IR is running in Corona 13. Slowdowns are not in the viewport, but rather in slate material editor. When IR is running everything in SME is more sluggish - dragging nodes around, connecting node handles, almost every operation needs to be tried 2-3 times before succeeding. Not a deal breaker, but certainly adds up to quite frustrating experience. SME was never smooth in Corona, but in V13 it’s even worse than usual.
What is your CPU Romullus, and could you share a sample screen capture?
Ryzen 5950x
I will try to record some screen capture some time later. I will also try to go back to Corona 12, just to check if slowdown is real and not something i imagine.
i realise hte latest daily may not have addressed the issue of the slowdown - but wanted to confirm and let you know i installed it and its still slow.
Has this issue been addressed yet in the latest release?