Asset produces error "Failed import for object property" upon loading editor

UE - Gameplay - Blueprint - Jan 18, 2016

Filepath for asset referenced in Gamemode blueprint produces error: /Game/ACustom/Code/cBP_Gamemode: Failed import for ObjectProperty /Game/ACustom/HUD/Game_UI.Game_UI_C:STMSG Fix up redirectors ...

Instance Static Meshes spawned at Runtime do not have collision

UE - Gameplay - May 8, 2015

Spawning an Instance Static Mesh at runtime does not have collision. This issue appears only in 4.8 Preview 1 and the 4.8 Release branch (tested on CL-2540862), but is fixed in Main Branch as of Ma ...

Light Shaft Occlusion causes exponential height fog to render incorrectly in stereoscopic

UE - Platform - XR - May 26, 2016

Enabling Light Shaft Occlusion causes exponential height fog to render incorrectly at certain viewing angles in stereoscopic. This does not reproduce once light shaft occlusion is turned off on the ...

Vehicle wheels have no collision on HTML5

UE - Platform - Mobile - Dec 2, 2016

A Wheeled Vehicle's wheels do not have collision when packaged into an HTML5 game. Regression?: Yes This issue did not occur in 4.13.2 Note: This is currently blocked from testing in Main as the P ...

Struct in Object class will not populate if an expose on spawn struct pin is split on "Construct Object from Class" node

UE - Gameplay - Blueprint - Jul 29, 2016

Struct in Object class will not populate if struct pin split on "Construct Object from Class" node. This does not appear to happen to other variable types. Workaround Do not split the struct pin, ...

Crash when a material with a texture parameter is deleted when it has instances with static permutations

UE - Graphics Features - Dec 28, 2016

This was the simplest solid repro I could get on this bug. The callstack is similar to [Link Removed] Also came across several Shader Compiling Manager crashes while attempting to repro this crash ...

Content Examples: Blueprints_Overview Stand 1.7 Spark particle system does not fire from coin

Docs - Samples - Jan 19, 2017

During runtime, the red coin in Stand 1.7 on the Blueprints_Overview map of Content Examples should emit a large spark particle system 5 times. While investigating, I tried disabling "Use Fixed Rel ...

Enabling "Support Deferred Rendering with Metal" Crashes on IOS device

UE - Platform - Mobile - Feb 8, 2017

After enabling "Support Deferred Rendering with Metal" and then launching to an IOS device (in this case iphone 6+) the game will no longer open and run. REGRESSION? Yes Worked in Binary 4.13.2 C ...

shadow seam occurs when lighting is built after object is rotated

UE - Graphics Features - Jul 12, 2017

There is an issue that is occurring where visible shadow seams appear after an object is rotated where it was not previously. CL tested 4.15.3 - CL 3450819 - Issue is present 4.16.2 - CL 3514769 - ...

Yellow 'Revert to Default' arrow disappears when not on screen

Tools - Jul 20, 2017

When a details value is changed, the yellow 'Revert to Defaults' arrow next to the changed value will vanish if the changed setting is scrolled off screen. This also prevents the arrow from reappea ...