Cloth simulation doesn't work correctly if Compute Skin Cache is ON.

UE - Simulation - Physics - Character - Aug 16, 2018

It seems that cloth simulation doesn't work correctly on 4.20 if Compute Skin Cache is ON. We can easily repro it with Content Example [Link Removed] Is this by design? ...

Preview Mesh for Skeleton/Animation can't be saved correctly

OLD - Anim - Aug 23, 2018

It seems that preview meshes of Skeleton/Animation can't be saved correctly. I had changed a preview mesh and had saved it, but after reopening the project, the setting was ignored and the preview ...

BP nativization can generate an invalid path including "__TEMP_BP__"

UE - Gameplay - Blueprint Compiler - Aug 27, 2018

The licensee sent us a BP that can't be nativized correctly on UDN. The nativized BP has wrong paths and causes a crash. ...

Instance Static Mesh instance doubles when upgrading from 4.18 to 4.19 or higher

UE - World Creation - Worldbuilding Tools - Foliage - Sep 4, 2018

Instance Static Mesh instance doubles when upgrading from 4.18 to 4.19 or higher. According to Licensee, manual check is difficult. ...

If user set ChunkID to a higher value, UpdateManagementDatabase will be very slow

UE - Gameplay - Sep 4, 2018

If user set ChunkID to a high value, the construction process of the database managed by AssetMAnager becomes very long. The cause is the following code in UChunkDependencyInfo :: BuildChunkDepende ...

HttpChunkInstaller Downloads All Chunk Without Permission

UE - Online - May 11, 2018

If user sets InstallSpeed of HttpChunkInstaller to anything other than Pause, the current HttpChunkInstaller checks all Manifests and downloads all Chunks without permission. Licensee wants to begi ...

GetPackageLengthForCooking can be much larger than the actual file path length

Tools - Jul 10, 2019

If the file path with the asset contains a project name, the cooking file pathlength is incorrectly increased. The following code in ContentBrowserUtils :: GetPackageLengthForCooking causes this is ...

Empty Mesh Sections with MergeActors Tool

UE - World Creation - Worldbuilding Tools - HLOD - Sep 27, 2019

Map Check will output the following error, which makes no sense: SM_FourCubes_1 - 1 element(s) with zero triangles in static mesh 'SM_FourCubes' ...

Crash on Event Begin Play with UMG Widget and 2 or More Players

UE - Editor - UI Systems - Feb 25, 2015

A player with UMG widget created on BeginPlay works fine when hitting play with only 1 player, but if you set the number of player > 1 it will crash. User believes this is somewhere related with t ...

Reaching max Pitch and Yaw while piloting an actor will cause the actor to roll randomly

Tools - May 30, 2017

Reaching max Pitch and Yaw while piloting an actor will cause the actor to roll randomly User Description: When pointing my view straight down or up the rotation values (x and z) go wild, this mak ...