Unreal Engine Issues

Incorrect Lumen Scene direct lighting when objects behind masked landscape

When objects are placed behind or beneath a masked landscape and r.Lumen.HardwareRayTracing.SurfaceCacheAlphaMasking is enabled, the direct light evaluation is incorrect. There are two workarounds, ...

TMaps do not function as expected in the details panel when then TMap variable is in a blueprint component

The default element can be added multiple times and changing the value from the drop down. ...

WP: The Generation log report doesn't contain the result of the ActorDescViewMutators

Recompiling an ABP that another ABP has a Property Access dependency on without recompiling/linking the other causes a crash

The crash comes from the pointers in FAnimSubsystem_PropertyAccess::Library::Indirections in the layer ABP from pointing to old/invalid functions and properties from the trash ABP_Manny, as they hav ...

Failed to generate Nanite data for mesh with bDoFastBuild enabled

If "bDoFastBuild" is enabled on a Static Mesh asset, in-editor it will never be able to have Nanite data built for it, preventing the Static Mesh from using Nanite. There is no way to fix this issu ...

Update LookupProxy chooser evaluation to work with soft object references.

Soft object references in proxy tables, when evaluated return a nullptr, instead of the soft object reference to load. ...

FNiagaraScalabilityManager incorrectly reactivates a NiagaraComponent that was deactivated by runtime user code

Context: The Niagara System is the primary tool to do visual effects inside Unreal. Niagara systems can be culled due to distance. Problem: Once a deactivated Niagara System is culled due to distan ...

Shader Complexity View not working in Deferred Mobile Preview

Proposed workaround:add in FMobileSceneRenderer::RenderDeferredMultiPass (MobileShadingRenderer.cpp): #if WITH_DEBUG_VIEW_MODES if (ViewFamily.UseDebugViewPS()) { return; } #endif // WITH_DEBU ...

Wrong density calculation in UBodySetup::CalculateMass

Wrong density calculation in UBodySetup::CalculateMass. The licensee has provided the following analysis and suggested fix: In UBodySetup::CalculateMass, the following code is present: // physical ...

Loading error for editor only BlueprintNativeEvent functions

The editor-only function in the native parent class is not compiled in the game module, which is why we're getting this error. The Blueprint compiler should follow suit during cooking and not genera ...