Unreal Engine Issues

If pasting a section causes an overlap, don't allow it if the track doesn't allow overlapping sections

Binding lifetime sections aren't meant to overlap, but duplicating one, or pasting one can cause them to overlap, triggering an ensure. Duplication and copying and pasting are typical actions, so th ...

Light Function and World Position in 5.4

When rendering a Light Function into the Translucency Lighting Volume, the World Position Material Expression returns the position relative to the Camera (unrotated), not the World. This can be mor ...

Navigation: Exiting game while async nav building tasks are running can cause null pointer access of OctreeController.NavOctree from worker thread

Context Projects can turn on the project setting bDoFullyAsyncNavDataGathering to execute navigation mesh building tasks on worker threads. Some of these tasks will access the NavOctree, whose life ...

Hair Material's Tangents input has no effect in PathTracing

Expectation: Tangent should work on Hair Material ...

Build lighting for single stationally light level generates a shadow map in PF_B8G8R8A8 format

Texture format override to BGRA8 due to changes in CL-30603716. The following code can restore the previous behavior. void FShadowMapPendingTexture::StartEncoding(ULevel* LightingScenario, ITexture ...

Additive Niagara Sprites are rendered with offset in right eye

Static/stationary child actor components are invisible and/or move position when placed inside a dynamically loaded level

When loading a non-world partitioned level into a persistent world partitioned level, parent actors with child actor components within the loaded map will move position or become invisible. Within t ...

RewindDebugger draws debug capsules with its base location as center

Context UE_VLOG macros can be used to capture debug shapes into both a Visual Logger recording and a Rewind Debugger recording. Problem In the Rewind Debugger, the capsule shapes are drawn at an in ...

Volumetric Fog has no shadow on mobile

Float Curve evaluation may yield completely wrong results due to floating-point precision issue

Note: This is possibly related to [Link Removed]. For some inputs, function UE::Curves::WeightedEvalForTwoKeys() inside file "CurveEvaluation.cpp" can incorrectly return the value of the first key, ...