Unreal Engine Issues

BlendSpace DeltaTimeRecord.Delta can incorrectly be set to zero

It's possible for blendspaces to end up with an invalid delta time record because of how UBlendSpace::TickAssetPlayer modifies the time record.  This only seems to happen with specific settings:Axis ...

4.23 UpdateGrass took twice time than 4.22

Metasounds - Using the Audio Component Play Node with a start timer other than 0 results in the Metasound ceasing to function

Metasounds cease functionality if called to Play with a different start time other than 0. This extends to the Metasound editor where pressing play to preview the sound also ceases to function. ...

In a Geometry Collection, enabling Nanite Fallback in a Nanite Enabled collection won't generate a Physics Body when Nanite is disabled

In a Geometry Collection, enabling Nanite Fallback in a Nanite Enabled collection won't generate a Physics Body when Nanite is disabled. To verify this, follow the steps provided in the Steps to Re ...

Subsurface Profile material in scene capture with r.SubsurfaceScattering set to 0 causes wrong value in alpha channel

[MetaSounds][Trigger Route] - If Value 0 is a non-zero value and Value 1 is a zero value, the output "pops" on triggering Set

When using the Trigger Route node, if Value 0 is a non-zero value and Value 1 is a zero value, the output "pops" on set. [Link Removed] ...

Paper2D Sprite Vertex Normals changed from 4.23 to 4.24

Comparing static mesh cube, plane, and a paper2d sprite with a lit material it appears that we've changed how we calculate the vertex normals for paper 2d sprites, see below: [Image Removed] ...

[CrashReport] UE4Editor_PropertyEditor!TSharedPtr<IPropertyUtilities,0>::ToSharedRef() [sharedpointer.h:794]

Top Crash in 4.18 release Comment from User: "Picking a color for my shader" Source Context:// NOTE: The following is an Unreal extension to standard shared_ptr behavior 788 FORCEINLINE ...

Overridden mesh values are lost when upgrading from 5.5.0/5.5.1 to 5.5.2 on blueprint skeletal mesh components

This issue is caused by the backout in 38341618.  The original code that went into 5.0 affects serialization by changing the UCS modified properties.  When upgrading, the override is lost because th ...

Geometry Collection (GC) fragments are affecting the Navmesh in wrong positions

Geometry Collection (GC) fragments are affecting the Navmesh in wrong positions and the identified cause is wrong indexing. Once a GC breaks, it's fragments, when big enough, are creating islands in ...