Unreal Engine Issues

Template_Default.umap and Template_Default_BuiltData.uasset will be changed each time after cook.

Each time after cook the Template_Default.umap or Template_Default_BuiltData.uasset are changed. But if I move Template_Default.umap to the project content folder, they will be the same as the las ...

Launching a specific UDN Project with Vulkan Support enabled crashes launching on Quest

When attempting to run the attached Project submitted from UDN, it will crash on launch. If Vulkan support is disabled, the Project will run as expected on Quest. This issue DOES NOT appear to repro ...

If using BP that inherits DataAsset as Value of Map in Struct, it will be replaced with PLACEHOLDER-CLASS after restarting editor.

Renaming a level containing Text3DComponent can cause crash

BuildTextMesh function queued as AsyncTasks may be called during saving (renaming) a level containing Text3DComponents.  The following workaround fix the problem. void UText3DComponent::BuildTextMe ...

Legacy Fbx: Importing multiple skeletalmesh put all of them in the same package.

FDeferredDecalProxy cannot be initialized to not fade even if FadeDuration is set to 0

FDeferredDecalProxy always fade because InitializeFadingParameters is always called and leaves InvFadeDuration at 1.0 and the LifetimeAlpha calculation in FDeferredDecalPS::SetParameters gets a very ...

PCG causes crash when UGrassInstancedStaticMeshComponent is set as a mesh entry for the static mesh spawner node

PCG causes crash when UGrassInstancedStaticMeshComponent is set as a mesh entry for the static mesh spawner node. ...

Baking lighting on Nanite landscape crashes the editor

When static lighting is baked using CPU lightmass for a nanite-enabled landscape it causes an editor crash with this assert: ...\Lightmass.cpp] [Line: 546] Attempting to add the same material twice ...

Add Substrate Material Support to Lumen Performance Overview

There is a discrepancy when inspecting Substrate materials in the Lumen Performance Overview. Compared to viewing non-Substrate materials the overview show all surfaces in red indicating that Lumen ...

Importing an FBX twice will cause a crash

When importing an FBX into a project if the "Import" option is chosen rather than "Import All" then importing the same FBX a second time will cause the editor to crash. ...