I have downloaded 5.6 engine ( pre compiled binary from epic ) and after I create new project with any template (fps, tps, etc.) everything have too bright fireflies. Even if i create a blank project.
I have arch linux + kde + wayland (and X11). + AMD RX 6800.
It been like this only on 5.6. If I open another downloaded earlier UE 5.5 everything works well, that make me confuse.
A tried at my another notebook with RTX 3080 and everything works fine (arch linux, kde x11) at 5.6
Is there some difference at start projects between 5.5 and 5.6? how fix that?
It looks like some sort of graphics corruption. I’m guessing in 5.6 the post processing volume which basically uses a texture to render effects such as bloom might be behaving strangely.
Try deleting the post processing volume and see if your viewport looks better. Maybe the shader cache in your project is damaged. Try deleting derived data cache and rerunning the project and see if rebuilt shaders don’t fix the problem. You can also try resetting your AMD drivers to default values.
Maybe 5.6 is more taxing than the previous version causing more stress on your card. How are your cards temps in 5.6? check with HWMonitor if you are not hitting some sort of heat limit while running the scene. You can also try limiting the FPS with the t.MaxFPS command and see if that changes anything.
In worse case scenario try switching graphics RHI to DX11 or Vulkan and see if it clears up.
I’ve seen multiple post with similar problems, and most of them if not all are on AMD graphics card.
Unreal engine has always major support for Nvidia first and then towards AMD.
So it is probably a graphics card issue, but not actually graphics card issue its just that 5.6 has some sort of problem running on AMD cards. lets just hope they resolve this fast, or maybe for now switch to 5.5 or earlier versions.
