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. ...

Crash When Substance Material Is Applied to a Mesh In HLOD System

UE - World Creation - Worldbuilding Tools - HLOD - Sep 3, 2018

Crash when Substance material is applied to a mesh included in the HLOD system. Working as expected in 4.19 CL# 4033788. Unable to test issue in 4.21 CL# 4339215 due to plugin dependency. Found in ...

Unimplemented Simplygon function causes empty mesh LODs and crashes

Tools - Aug 31, 2018

When we do the refactor for MeshDescription we miss the staticmesh reduction project settings option and change only the quadric reduction. There are two possible fixes for this issue: 1. Implemen ...

Assert when having too many VR devices

UE - Platform - XR - Aug 31, 2018

Internal team is encountering a crash when adding too many VR devices. Email thread titled "Re: Crash Logs" The bug is an internal limit of devices the code supports, which is 8. If a controller o ...

Project cannot build in VS 2017 15.8+ if it uses std::make_shared with an over-aligned type

UE - Foundation - Core - Aug 30, 2018

Visual Studio 2017 15.8 includes a fix to properly handle std::make_shared used with over-aligned types. However, this is a breaking fix and requires the definition of one of two macros to either ac ...

Sprites/Flipbooks only render in left eye with Instanced Stereo Rendering enabled

UE - Platform - XR - Aug 30, 2018

Paper2D sprites render only in left eye with Instanced Stereo enabled. Also confirmed in Main CL 4329255 ...

Modifying collision shapes on a Skeletal Mesh with multiple cloth assets crashes

UE - Simulation - Physics - Character - Aug 30, 2018

For skeletal meshes with multiple cloth assets in use, modifying any of the bone's collision body setup in the physics asset causes a crash.  ...

Find Session times out when run while in a Steam Session

UE - Networking - Aug 30, 2018

A user has reported an issue where Find Session times out when attempting to run it while hosting a Steam session or while being the client of one. The user mentions that this is caused by RequestLo ...

Packaged project crashes on launch if third string literal in NSLOCTEXT macro is an empty string

UE - Editor - UI Systems - Localization - Aug 30, 2018

Using the NSLOCTEXT macro with the third string literal as an empty string causes a packaged game to immediately crash on launch. No Crash Reporter window opens, and no log is created. A sample pro ...

Crash When Loading a SubLevel With HierarchicalInstancedStaticMeshComponent and SphereReflectionCapture via the Levels Window

UE - Graphics Features - Aug 30, 2018

The editor crashes when loading a SubLevel with HierarchicalInstancedStaticMeshComponent and SphereReflectionCapture via the levels window. Working as expected in 4.19 CL# 4033788 Found in 4.20 CL# ...