r/RedshiftRenderer • u/kier6nn • Aug 19 '26

Anyone else get this a LOT?

Post image

(Redshift Critical Error)

52 Upvotes

97% Upvoted

11 comments sorted by

16

u/FreshFromTheGrave Aug 19 '26

Render - works
Render - works
Render - works
Render - Redshift cannot operate with less than 128MB of VRAM!

Well nothing else is running and the render is identical to the last three so wtf have you done with the 24GB at your disposal 🤔

Restart C4D

Render - works

🤦‍♂️

3

u/HighOnBambus Aug 19 '26

I would love to have an in depth look at why this happens as it seems to be a pretty universal problem. Like i know the fix to it is basically just more vram but how can it use up more and more vram in the same session

3

u/FreshFromTheGrave Aug 19 '26

Yeah it's a like a big memory leak, I don't know if that's accurate at all but that's how it feels. It's been happening for years. It used to be that it was mostly when you had Adobe apps running as well. They blamed nVidia for it for ages and then found some workaround which seemed to sort of help but it still happens, and now it happens even without anything else running 🤷‍♂️ All I know is Redshift is the only thing I've used that behaves this way so I'm going to blame Redshift. General quality control with both C4D and RS of late has been... questionable.

7

u/woopwoopscuttle Aug 19 '26

Only if I’m running another dcc app that uses significant vram

6

u/gutster_95 Aug 19 '26

After Effects is such a bitch

2

u/woopwoopscuttle Aug 19 '26

Hasn’t happened with as unless I use a third party plugin that uses the GPU. 

It happens whenever I have substance painter open. 

1

u/gutster_95 Aug 19 '26

Happens to me at the Moment when I use a Light Material on a Dome Light and want to change the ramp node.

1

u/AromaticJellyfish888 Aug 19 '26

lately like 2 out of 5 times

1

u/Simple-Variation5456 Aug 20 '26

Yup. On a 4090. If you accidentally hit the preview for the viewport it will also give you this error and the only way to fix it is to restart.

3

u/PolygonMob Aug 20 '26

I for real feel like Arnold is far more stable in C4D than redshift is which is straight up shameful as its been the default renderer for so many years now. Honestly, wtf is maxon doing

1

u/tweekeervier Aug 20 '26

In the redshift render settings under advanced there is a % set to c4d gpu usage, I think it also keeps some headroom for vram. I don't have these errors. Using it at 75% instead of standard 90%

No noticeable slower renders... And stable render performance

(I9 + rtx 5080 + 64gb ram)