Unreal Engine Issues

Color shifting occurs from screen probe gather ping-pong when Lumen active

A subtle yellow tint color shift occurs when Lumen is active due to usage of R11G11B10_Float targets, mostly from r.Lumen.ScreenProbeGather.SpatialFilterProbes where we ping-pong between R11G11B10_F ...

RHICoreShader ValidateStaticUniformBuffer expected shader logging is confusing

The log output in ValidateStaticUniformBuffer, lists hashes that do not correspond to the actual shader name which makes it difficult to track down problem shaders. The current log output code is ...

FFragmentTypeParameters is missing a default initialiser for FFragmentTypeParameters::Flags

FFragmentTypeParameters misses a default initialiser for FFragmentTypeParameters::Flags. This can lead to Flags being left in an undefined state, which can ultimately cause non-determinism during th ...

Duplicating an imported socket wrongly displays the duplicate as also imported

The duplication of an imported mesh wrongly marks it as also imported from the source mesh. The probable cause is data duplication without taking this edge case into account. I suggest checking Unr ...

Curve Table Editor's "Add Key" functionality does not work and appears to not be implemented..

Creating a new Curve Table asset, and then trying to use the right-click menu "Add Key" option does not do anything. FRealCurveModel still has the function, but it is left intentionally empty despit ...

"Assertion failed: CellIndex < CellIndexMax" when there are a lot of HISM foliage in a level

Users have come across an issue in 5.4 that causes an assert when many foliage or HISM objects are placed in a level due to a cell size limit. ...

Enabling ZenLoader causes editor crash when undoing Level Instance deletion

Crash reported through UDN. With ZenLoader enabled, deleting a level instance and triggering Undo causes a crash in  ULandscapeComponent::PostEditUndo() The user has provided an example project th ...

FBoneContainer::MakeMeshPoseIndex crash (out-of-bounds array)

The Remove-On-Break feature, set on Fracture Mode on Geometry Collections, stops shrinking and shows strange behaviors

The Remove-On-Break (ROB) feature, set on Fracture Mode on Geometry Collections (GC), was supposed to make the particle shrink until it vanishes. When the GC goes to sleep the shrinking stops and sh ...

Level Instance desaturation effect does not respect occlusion when the selected object is occluded by a Nanite mesh

When selecting an asset in a level instance that is being edited via LevelInstance/Edit, the silhouette of the object is visible through occluding nanite meshes. This has the effect of disabling th ...