Apex Cloth will not render correctly with cloth assigned to multiple materials

UE - Simulation - Physics - Character - Nov 12, 2015

Apex cloth material assigned to multiple material elements will not render correctly in Persona or when PIE/Simulate in the editor. Any material element other than element 0 will be masked/invisible ...

Blueprint CanJump node will return true once after current jumps is over max jumps and never return true again

UE - Gameplay - Sep 5, 2016

CanJump Blueprint node will return true for 1 jump after "MaxJumps" and if this happens, will never return true again, even after Character has landed and CurrentJumps has reset. ...

Closing the editor after losing connection to perforce will cancel the save and discard changes

Tools - Jan 7, 2016

If a project loses connection to perforce and is then closed, the editor will prompt to save changes. If any of those changes require checking out an asset, the editor will prompt to check out the ...

Project Launcher Back Icon Disappears when 'Use Small Toolbar Icons' is Enabled

Tools - Mar 31, 2015

With 'Use Small Toolbar Icons' checked in the 'Editor Preferences', the 'Back' button within the 'Project Launcher' disappears. The expected would for the button to get smaller and not vanish entir ...

Using Collision in Niagara without an Update Age module will prevent any particles from spawning

UE - Niagara - Feb 17, 2020

Using Collision without Update Age will prevent any particles from spawning. In Collision Query and Response DataInstance.Alive has a default value of false. If no other module sets DataInstance.Ali ...

Importing camera FBX through Python will not import focal length

UE - Anim - Sequencer - Aug 12, 2020

Importing a camera's FBX through Python will not import a camera's animated focal length. ...

Assets Using the SpeedTree in a material will render static shadows in Reflection Captures

UE - Graphics Features - May 26, 2015

When using a SpeedTree asset in a scene with a Reflection Capture actor the baked static shadow from an asset will be captured, even though the asset will not due to using the SpeedTree node in the ...

Alembic Import with empty first frame will cause the editor to crash

UE - Gameplay - Aug 10, 2016

The editor will crash when importing an Alembic file with an empty first frame. ...

Function output nodes containing an array will cause packaging to fail when nativizing blueprints

UE - Gameplay - Blueprint - Aug 14, 2017

If a blueprint contains a function with an array output and the project is being nativized, the package will fail with an error similar to "error C2679: binary '=': no operator found which takes a r ...

Android app will get crashed if it disable HDR and run with Vulkan API

UE - Platform - Mobile - May 17, 2018

The backtrace is: F/DEBUG   : backtrace: F/DEBUG   :     #00 pc 00070e22  /vendor/lib/hw/vulkan.msm8994.so (A4xCommandBuffer::HwProcessWorkload(QglWorkload*)+585) F/DEBUG   :     #01 pc 0004758d  / ...