"Build" button causes "Validation failed" and breaks references of meshes in Sublevel according to a prescribed procedure

Tools - BSP - Feb 9, 2019

A licensee reported that "Build" button causes "Validation failed" and breaks meshes in a Sublevel according to a prescribed procedure. The process is quite complicated, but I can 100% reproduce thi ...

Material Opacity Mask Not Working As Expected in PIE but Does in Standalone

Rendering - Feb 5, 2019

Material Mask Opacity is not working in PIE, but works as expected in Standalone.  Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 CL# 4862710, and 4.23 CL# 4898645 ...

Unused Foliage Type Causing Unbuilt Lighting

Tools - Foliage - Feb 1, 2019

Foliage components will be unbuilt even after deleting all of the placed foliage in a level. Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 CL# 4827620 ...

iOS: Local notifications can be overridden if using the same title

Platform - Mobile - Feb 1, 2019

A customer found out that the NotificationNumber static variable is never incremented. This results in a constant NotificationIdentifier string when using the same Title. Seems like it should be ...

Delete Assets dialog returns non-valid assets for the list of assets that can replace the references

Tools - Jan 31, 2019

The Delete Assets window's list of assets that are available to replace the references to an asset that is being deleted returns additional assets that are not valid replacements. The provided pro ...

Foliage LOD's Screen Size Can't be Set Higher Than 1.5

Tools - Foliage - Jan 31, 2019

Foliage LOD's Screen Size Can't be Set Higher Than 1.5 Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 CL# 4827620 ...

Wheeled vehicle movement is jittery on clients

Physics - Jan 29, 2019

Vehicle movement is jittery on clients. This is most apparent when turning while driving. This was also tested in a packaged game with local multiplayer setup. Regression?: Yes This does not occur ...

Documentation for Geographically Accurate Sun Positioning contains Incorrect Definition for Longitude and Latitude.

Docs - Jan 28, 2019

Incorrect definitions for Latitude/Longitude in Documentation for Geographically accurate sun positioning.  https://docs.unrealengine.com/en-us/Engine/Rendering/LightingAndShadows/SunPositioner Ex ...