I was hoping this will go away with ue5 but no, same problem as in ue4: when working on my laptop there’s 100% chance of editor crashing eventually with this error. Sometimes happens after an hour or two, sometimes after 15 minutes. Screen flickers black and my unsaved work is gone.
It’s really annoying.
I’ve read somewhere that unsaved changes are stored in video memory and cleared when saved to disk but that doesn’t make much sense, does it?
Anyways my laptop has 16 gigs of ram, gpu has 4. This problem never happens on my ‘better’ stationary rig. Is there a way around it?
Unreal crashes when your GPU is out of VRAM.
Go to Task Manager. Performance. GPU and look at Dedicated GPU Memory.
It fills your memory with textures when you open a level and doesn’t unload it. There is no garbage collection in Unreal Editor. Only way to free up your vram is by closing Unreal and restarting.
Navigate to (EngineInstallPath)\Engine\Config\ConsoleVariables.ini
open and on a new line enter:
save and close, launch the editor.
This will execute the command every time you open the editor, the command tells UE4/5 to use a lower MipMap. Because its a bias, it will lower any texture by 5 MipMaps regardless of its size, 8K will go to 512, 2k to 64 etc, you can choose a different number to go up or down sizes.
To return to normal, just run the command in editor r.MipMapLODBias -1 or other numbers to view other bias, max is 14.
Do note the difference between the .ini vs the in-editor commands, ini uses an = sign, in editor uses a space.
As for unchanged saves affecting video ram, it has to keep those changes somewhere, and textures are stored in VRAM. If your base game has say 3.7GB VRAM usage needed, and you change 300mb+ worth of data, it will crash.
I get this error any time i try to build reflection captures for my level. I do not know why… I literally have 2 RTX 3090s in NVLink… 24gb of ram each… Makes no sense since this project and its levle used to build in much older versions of UE4. Now its not a lightmap related bug… its a reflection capture build bug. What worries me is other people have complained about this even in 4.25… and no fix. Im thiinking the epic devs are more focused on new features then they are making their editor useable. Plus their new bug reporting system that replaced “Answers Unreal” … You cant add to the bug what you have learned about it… if you report it.
If you’re on a laptop make sure you’re not using the integrated GPU, you can disable it in the Nvidia control panel under 3D settings. Also, make sure your laptop is plugged in, performance is often throttled when you’re on battery.
In that case it sounds more like an issue with the video card manufacturer? Best to create a ticket with them and provide the crash report (event viewer) along with your DX info. There’s no guarantee they will fix it but at least it’ll be out there.