Performance drop in Orthographic views when Visualize->Volumetric Lightmap

UE - Graphics Features - Lumen - Mar 4, 2019

Severe performance drop when when entering Orthographic view, but only when Volumetric Lightmap is selected. ...

Setting a Vector value in the Material Parameter Collection causes crash

UE - Graphics Features - Mar 1, 2019

Creating a Vector parameter within the Material Parameter collection causes a crash with the engine. Tested in 4.21.2 (CL - 4753647), 4.22 (CL - 5159901), 4.23 (CL - 4980862) ...

Changing setting in RecastNavMesh breaks "reference" to NavMeshBoundsVolume

UE - AI - Mar 1, 2019

When you create a NavMeshBoundsVolume, it automatically creates a RecastNavMesh-Default. You can change the settings of the nav mesh there. However when you change settings of this RecastNavMesh it ...

UWorld::CleanupWorld causes issues with sublevels when changing maps after building lighting

Tools - Mar 1, 2019

A licensee has reported that UWorld::CleanupWorld is causing issues with assets in Sublevels if you build lighting on the parent level, save all of the maps, and then change to another level. The as ...

Integer Blueprint variables reset the Bitmask Enum setting when the Editor closes

UE - Gameplay - Blueprint - Feb 28, 2019

User created Bitmask flag Enumerators are not correctly stored and retrieved from Blueprint Integer variable settings. When the Editor is restarted the value of the Integer's Bitmask Enum is set to ...

Crash When Building Lighting for a Level with Previously Purged Lightmaps

UE - Graphics Features - Feb 27, 2019

If you go into World settings, select Force No Precomputed Lighting, rebuild lighting to purge lightmaps, uncheck Force No Precomputed Lighting, save level, quit, reload project and try rebuilding l ...

Compile error when Blueprint Interface returns a map type variable

UE - Gameplay - Blueprint - Feb 26, 2019

A Blueprint Interface function that returns a map type variable will fail compiling with various errors when called in another Blueprint. If the same function is setup in the Actor Blueprint instead ...

ResavePackages commandlet breaks sublevel translation

UE - Gameplay - Feb 26, 2019

Rebuilding lighting with commandlet will move hidden sublevels Confirmed in 4.23 MAIN @ CL 5194133 ...

Moving .uassets that were imported from a source file with Source Control active moves the source file without marking for add

Tools - Feb 26, 2019

A licensee has reported an issue with Perforce source control integration. The issue is related to the source file for an asset that was imported into the editor. If this source file is also checked ...

Crash When Setting a Bool in a Niagara Parameter Collection via Blueprint

UE - Niagara - Feb 26, 2019

The Editor will crash when setting a bool in a Niagara Parameter Collection via Blueprint. Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 CL# 5159901, 4.23 CL# 5194133 ...