UE 5.6 Editor viewport: selected actors turn black only when selected

Development Programming & Scripting Blueprint
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Engine version:
Unreal Engine 5.6

Platform:
Windows

GPU:
NVIDIA GeForce RTX 4080 SUPER

Driver version:
32.0.15.9186 (NVIDIA 591.86)

RHI:
DX12

Issue:
In the editor viewport, actors look normal when unselected, but become very dark / almost black immediately when selected.

Important details:

  • This only happens in the editor viewport
  • Actors look normal when not selected
  • The darkening happens only when selected
  • This affects all actors, not just specific ones
  • This happens in all maps, not just one level
  • Disabling Selection Outline does NOT fix it
  • Replacing the material with a simple/default material does NOT fix it
  • Disabling the scene PPV (Post Process Volume) does NOT fix it either

What I already checked:

  • Disabled Selection Outline: no effect
  • Replaced materials with default/simple materials: no effect
  • Recent C++ changes do not touch selection rendering, custom depth, or editor highlight logic
  • The only recent C++ change was navigation-related and unrelated to viewport selection rendering
  • Since this affects all actors and all maps, it does not look like a single asset or single level content problem
  • Since it still happens with PPV disabled, it does not seem to be caused by a normal scene Post Process Volume setup

Current suspicion:
This looks more like an editor viewport rendering/compositing issue in UE 5.6, possibly related to:

  • editor selection compositing pass
  • DX12 editor viewport rendering path
  • global editor viewport processing such as Local Exposure / Eye Adaptation / Tonemapper
  • engine regression or GPU driver compatibility issue

Questions:

  • Has anyone seen all actors turn dark/black only when selected in UE 5.6?
  • Is this a known UE 5.6 editor viewport bug?
  • Could this be related to DX12, NVIDIA RTX 4080 SUPER, or a specific editor rendering path?

This does not affect runtime/game rendering, only the editor viewport while selecting actors.

2

It’s worth trying the latest drivers, you quite a long way behind there ( 596.36 )

3

I agree, a driver refresh is the best test you can go for here. I would suggest using DDU to fully clear your current install, then go for the latest version of the Studio drivers, instead of GameReady, as the studio variant is the most stable for engine work and development.

If that’s not the case, I would also try disabling any active overlay in your system, specially the one from Discord, which has caused a lot of headaches with UE lately (menu glitches, project crashes, etc). Also, regarding DX12, it’s worth testing if the issue remains active when using DX11 instead. You can force the engine to do so by adding the -dx11 flag on the launcher.

Finally, for any graphic issue like this, a shader cache clear can help. Close UE, navigate to your project’s main directory, and delete folders DerivedDataCache, Intermediate, and Saved. After that, re-open your project, and allow shaders to fully recompile.

4

Well Thanks a lot, Let me have a try

5

Well Thanks a lot, Let me have a try for few days

6

(post deleted by author)

7

Tried all but can’t resove it.

8

Tried but can’t resove it.