Setting animbp reference variable in construction script creates additional animbp reference if simulating

UE - Gameplay - Blueprint - May 24, 2016

If a reference to the animBP is set in the construction script of an actor, simulating will show two separate instances of the animBP instead of one. Setting this on Event Begin Play does not produc ...

Placing a Physics Constraint Component in an Actor Triggers a Warning During PIE When There Are No Constrained Components

UE - Simulation - Physics - May 15, 2017

A warning is appearing in the output log during PIE when an actor contains a Physics Constraint component that does not have any constrained components set. This did not occur in 4.15.2, this is a ...

Cannot add to Override Materials array of a Static Mesh Component

UE - Graphics Features - May 23, 2017

Materials cannot be added to the Override Materials array in a static mesh component because attempting to add elements to the array fails. Regression: Yes - using the plus button to add to the arr ...

CoreRedirects cannot be properly used to rename a BlueprintImplementableEvent that has a return value

UE - Gameplay - Blueprint - Dec 7, 2017

Attempting to use CoreRedirects to rename a BlueprintImplementableEvent that has a return value results in the function not being renamed in the Blueprint subclasses and its Return Value nodes causi ...

Breakpoint triggered in Visual Studio after running "{,,UE4Editor-Core}::PrintScriptCallstack()" command

UE - Gameplay - Blueprint - Jan 10, 2018

Running the command {,,UE4Editor-Core}::PrintScriptCallstack() in the Immediate Window in Visual Studio while debugging is paused in Visual Studio will result in a breakpoint being hit when the ...

Launching a packaged game will cause it to open on the leftmost monitor, ignoring your primary monitor

Tools - Jan 17, 2018

A licensee has reported that opening a packaged game in 4.18 and onward will cause the packaged game to appear on their left most monitor, rather than their primary monitor. This was not the case in ...

Object Scale Material Node Returning Incorrect Information When Rotated to Certain Angles

UE - Graphics Features - Jul 17, 2018

When using the object scale node in a material it will return incorrect values if rotated to certain angles. Found in 4.19 CL# 4033788, 4.20 Preview 20 CL# 4173640, 4.21 CL# 4209927 ...

Disabling "Support Stationary Skylight" Causes Crash With Forward Shading Enabled

UE - Graphics Features - Jul 30, 2018

Disabling 'Support Stationary Skylight' crashes if you select anything in the editor when Forward Shading is also enabled. Working as expected 4.19 4033788 Found in 4.20 CL# 433996 and 4.21 CL# 42 ...

SceneCapture2D Crashes When Changing to a Mobile Preview

UE - Platform - Mobile - Oct 16, 2018

With a SceneCapture2D actor in a level the editor will crash when changing to a mobile preview. Working as expected in 4.20 CL# 4369336 Found in 4.21 Preview 1 CL# 4435822 and 4.22 CL# 4470579 Th ...

Selecting Two Sided Foliage In Editor with Material Layers Enabled Causes Crash

UE - Graphics Features - Nov 20, 2018

With material layers enabled, selecting two sided foliage will cause the engine to crash. This is working as expected in 4.20 CL# 4369336. Found in 4.21 CL# 4541578 and 4.22 CL# 4573698 This is a ...