I am getting a wired-type lighting glitch in Unreal Engine 5.4.4. It is happening with both my graphics cards(two PCs). They both have 4060ti. If I install an old graphics driver, it works for a
few days.
few days.
I have the same issue in a even more extreme way (heavy light flickering, extreme artifacting of light, reflections completely off). Tried different UE versions, different drivers, different settings…nothing helps. It randomly started and I cannot find any solutions online. Running it on a 4090.
I have found a temporary solution from Reddit. Use (r.shadow.Denoiser 0) in your project cmd.
It is an issue with the lighting. it makes it more noise.
Thanks @946710Ashish11 ! Did this resolve the glitch for you? I was testing it and it seems to have helped the problem on my end.
Hello @946710Ashish1!
If the above solutions have not helped, I have some solutions we can try.
Are you using Virtual Shadow Maps as your project’s shadow type? If so, I’ve encountered this problem several times with VSM. A good way to check if this is your issue is to change your lighting mode to Shadow Mask.
If you continue to see the flickering in here, then VSM is your issue.
The easiest solution is to just switch from Virtual Shadow Maps to Shadow Maps in your project settings (under Engine → Rendering)
But if your project is using Nanite, you will likely want to keep Virtual Shadow Maps on. In this case, the flickering could be caused by too many lights in your scene, that light having too big of an attenuation radius, particle systems with light renderer components, or just a bad light that can be deleted and replaced to fix the error. All of these have been solutions on projects I have worked on.