Unreal Engine Issues

Editor hits Asserts when trying to use debug rendering such as ShowFlag.LODColoration

The assert in BasePassRendering.cpp:693 fires, crashing to desktop when using this console command in the editor, in PIE, and closes out the window when playing in Standalone. Does not crash when us ...

Text Render Actor with Material Instance using Parameter crashes when playing Standalone Game

Material Instance with Parameters on Text Render Actor causes crash when playing in Standalone. Reported and tested in version 4.25(CL 13942748). Works as expected in 4.24(CL 11590370). ...

Memory leaks at changing lighting scenarios

The engine does not free the LevelRenderAssetManagers array elements in FRenderAssetStreamingManager when changing lighting scenarios. Following code can avoid this issue. void FRenderAssetStre ...

Unfocused Standalone window has reduced performance

User description: When I run two windowed standalone instances to test multiplayer, the unfocused window gets about 2-5 fps...but if I focus on it, smooth 120fps, yet the opposite screen is now onl ...

Text3d renders backwards.

When adding a Text3D actor (after placed as Child Component), into viewport the actor renders backward and not as expected. I was able to reproduce this issue in 4.25.3, but did not have this issue ...

D3D device being lost ( DXGI_ERROR_DEVICE_REMOVED ) on both D3D11 and D3D12

It is hard to reproduce, but a licensee reported in UDN that it crashed on his computer frequently. He provided two crash dumps with logs which I uploaded here.[Link Removed][Link Removed] OS: W ...

Fix primitive uniform buffer validation.

GPUScene primitive validation is currently busted and asserts. It looks like there are two problems: 1) NaN's in the entries can cause comparison issues, so a MemCmp would be better. 2) There's a ...

Crash when using UShaderCodeLibraryToolsCommandlet in 4.25

Flickering artifacts are rendered when using Sky Atmosphere Component with Vulkan

Rendering the SkyAtmopshere component using Vulkan with and without Vulkan (SM5) enabled causes artifacts to appear on screen on Windows and Linux.  This was reported and tested in 4.25.1 (CL-135 ...

[CrashReport] UE4Editor-D3D12RHI!static void SetRayTracingHitGroup(class FD3D12CommandContext & const, class FD3D12RayTracingShaderTable *,

Generated from CrashReporter Error Message: Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x00000088 User message (Aritzia_Bistro.log): datasmith re-import ...