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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.