After launching any Unreal Engine version between 5.1.1 and 5.6.1, the editor viewport and UI become heavily corrupted — showing bright yellow, pink, and cyan colors, screen flickering, and partial transparency of UI panels. The issue appears immediately after the editor loads or when opening the Project Settings panel. Viewport sometimes becomes unusable with psychedelic colors, even when menus remain functional. even after any new window i open say any blueprint window or anything Tested Versions Unreal Engine 5.1.1 Unreal Engine 5.6.1 All versions exhibit identical behavior.
| GPU NVIDIA RTX 4060 Laptop GPU
| Driver Latest Game Ready tested | CPU 12th Gen Intel(R) Core™ i7-12700H (2.30 GHz)
| RAM 16GB
| Operating System Windows 11 Home Single Language 25H2 | Display 1080p
| Hybrid GPU Mode |Yes (Intel iGPU + NVIDIA Optimus) | HDR | Off | | Hardware-Accelerated GPU Scheduling Tested ON/OFF — no difference
Troubleshooting Already Attempted Switched RHI between DirectX 12, DirectX 11, and Vulkan (via DefaultEngine.ini and launch arguments).
Performed clean driver reinstall Deleted Saved, Intermediate, and DerivedDataCache folders. Moved project out of OneDrive to local SSD. Tested with completely new empty projects. Problem persists across all Unreal versions and configurations. Issue began only after installing Unreal — other 3D applications (Blender, Unity, games) render correctly The issue is severe enough to make Unreal unusable on affected laptops.
