Viewport extremely stuttery when IES is missing for light sources

[SmurfN]

finally figured out a bug thats been a plague in some scene. if the corona light is missing ies file the viewport becomes extremely stuttering if the corona lights that are missing the IES file is visible in viewport. as soon as the light is not visible in the viewport its fine or the IES is removed the viewport is fine. Very weird bug.

[GeorgeK]

finally figured out a bug thats been a plague in some scene. if the corona light is missing ies file the viewport becomes extremely stuttering if the corona lights that are missing the IES file is visible in viewport. as soon as the light is not visible in the viewport its fine or the IES is removed the viewport is fine. Very weird bug.

Hi and thanks for reporting this to us, I was unable to reproduce this, is it possible to share the file with just that corona light? Can you also please clarify which Corona version you are currently on and 3dsMax?

[SmurfN]

here is max file with only the corona lights. issue is immediately apparent for me at least.
https://we.tl/t-7q1878eIU1

Max 2022 and corona 9, (issue was the same in 8)

[GeorgeK]

here is max file with only the corona lights. issue is immediately apparent for me at least.
https://we.tl/t-7q1878eIU1

Max 2022 and corona 9, (issue was the same in 8)

Thank you, investigating.

[GeorgeK]

Can you please clarify what GPU you are currently using, and what's your desktop resolution?

[SmurfN]

Can you please clarify what GPU you are currently using?

3080ti
Nvidia driver: 512.77
Threadripper 3970x
Windows 11 pro
Version
21H2

[GeorgeK]

Can you please clarify what GPU you are currently using?

3080ti
Nvidia driver: 512.77
Threadripper 3970x
Windows 11 pro
Version
21H2

Thanks, some of us were able to reproduce so logging it for now and please stay posted until the investigation is complete.

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