~FStaticMesh() can crash with race condition

UE - Graphics Features - Mar 21, 2017

UDN user reported frequent crashes in FStaticMesh::~FStaticMesh() on DrawListLinks[i]->Remove(false); Crash went away after adding critical sections to FStaticMesh::LinkDrawList(), FStaticMesh::Unl ...

App Cannot be Selected as the Tool for Diffing Text on a Mac

Tools - Mar 21, 2017

Editor Preferences -> General -> Loading & Saving> Source Control: the "Tool for diffing text" dialog box doesn't let you choose an application, because the file extension is set to .exe (for Windo ...

Crash when creating a key in a blackboard with a name longer than 1024 characters

UE - AI - Mar 21, 2017

Black board key names that are longer than 1024 characters will cause a crash ...

Root Motion does not work with Sub Anim Instances

OLD - Anim - Mar 20, 2017

Root Motion does not work with Sub Anim Instances. Note: "Root Motion from Everything" is enabled on the Sub and Top AnimBPs ...

Hierarchical Instanced Static Mesh Has Color Fill When Selected

UE - Graphics Features - Mar 20, 2017

Hierarchical Instanced Static Mesh have a fill color when selected. This isn't consistent with how static meshes appear when selected. Normally they only have a colored outline that appears. There i ...

Particle Frequency Not Working As Expected

UE - Graphics Features - Mar 20, 2017

Particle frequency doesn't appear to have any visible influence on the particle system. You can test this by changing the particle frequency value on the particle system in the attached project. ...

Standalone window goes behind other windows when using a combination of Set fullscreen mode and Apply Resolution settings

Tools - Mar 20, 2017

Standalone window goes behind other windows when using a combination of Set fullscreen mode and Apply Resolution settings ...

CrowdManager never calls StartUsingCustomLink() on Agents when Custom NavLinks are Placed in the Level and Traversed

UE - AI - Mar 20, 2017

StartUsingCustomLink() never gets called in the CrowdManager when an AI with a UCrowdFollowingComponent begins to traverse a NavLinkProxy that has been placed in the world. The link UserID always r ...

FPropertyEditorInlineClassFilter confusing (and wrong) IsA semantics

Tools - Mar 20, 2017

FPropertyEditorInlineClassFilter IsUnloadedClassAllowed and IsClassAllowed use the confusing IsA semantics. In the IsUnloadedClassAllowed, the usage seems wrong completely. It seems like the real i ...

Landscape Grass Tool loss of Performance

UE - World Creation - Worldbuilding Tools - Foliage - Mar 20, 2017

A number of users are reporting a large drop in performance when working with the landscape grass tool compared to other foliage application methods, as well as a drop in performance since previous ...