Mesh Vertex Painting Broken for Splines

UE - Rendering Architecture - May 22, 2023

The mesh painting mode appears to no longer work on splines, as the vertexes seem to have all vertex colors at 1, 1, 1, 1 by default, and can't be removed or painted anything else. ...

Starter Content and ArchVis Default Included in Blank Project

UE - Content - Template - May 22, 2023

When creating a project using Automotive, Product Design & Manufacturing - Blank template. no content options are available, but 'Starter Content' and 'Archvis Default' are added automatically. ...

Engine freezes when Level Sequence format is in seconds

UE - Anim - Sequencer - May 22, 2023

When using the jumpbox with a sequence that is in seconds (not fps) the engine will freeze. This issue is occurring in Binary //UE5/Release-5.2 @ CL 25360045 This issue is occurring in Binary //UE ...

DX12/SM6 Sampler Counts increased for empty materials between 5.1 and 5.2

UE - Rendering Architecture - Materials - May 19, 2023

While not a major issue in and of itself, this can cause considerable headaches for materials where sampler counts in 5.1 were at 15/16 or 16/16 and when upgrading to 5.2 are now exceeding the built ...

Merge Actors Tool Simplifies Nanite Meshes

UE - World Creation - Worldbuilding Tools - Merge Actor - May 19, 2023

Tried every combination of LOD Selection Type, Nanite enanbled/disabled, the only way it would seem to get the full number of triangles from the source mesh into the merged mesh is to disable Nanite ...

Deferred spawned actors can receive BeginPlay before they are finished spawning

UE - Gameplay - May 18, 2023

Actors that are deferred spawned on BeginPlay can be added to the world while AWorldSettings::NotifyBeginPlay is still iterating the world's actors and dispatching BeginPlay. AActor::DispatchBeginPl ...

GameInstance and subsystem initialization order is incorrect for Play In Editor

UE - Gameplay - May 18, 2023

The order of world and game instance initialization is different between a true standalone game (cooked game or an editor build with -game) and a Play In Editor game. Specifically, in Play in Editor ...

Sampling UV1 on a Nanite mesh with one UV channel returns a constant value

UE - Rendering Architecture - May 17, 2023

This is general for any UV channel past what the static mesh has, rather than specifically for UV channel 1. ...

Push-model blueprint array property not properly marked dirty if modified by different actor

UE - Gameplay - May 17, 2023

In KismetArrayLibrary.h, functions that modify the array property call MARK_PROPERTY_DIRTY(Stack.Object, ArrayProperty). Because these calls use the stack object and not the property's owner, modify ...

Raytraced Shadows render incorrectly in a project that has been converted from 5.0.3 to 5.1.1 to 5.2

UE - Graphics Features - Ray Tracing - May 16, 2023

Version to VersionResultsNew 5.0.3 project to 5.1.1Works as ExpectedNew 5.1.1 project to 5.2Works as ExpectedNew 5.0.3 project to 5.1.1 to 5.2Bug OccursNew 5.0.3 project to 5.2 Bug Occurs The scene ...