Reflections Appear Black

UE - Graphics Features - Nov 13, 2015

Adding Screen Space reflections to a Translucent Material Causes black reflections. Sometimes the reflections are completely white and do not change when changing the intensity of the lighting. [L ...

Localization warnings when opening a new project in 4.8.1

Tools - Jul 2, 2015

There are a couple of warnings that show up in the output log that are dealing with localization when opening up a new project. ...

Scale of the parent of a Motion Controller Component is ignored

UE - Platform - XR - Nov 17, 2016

Seems like although you can set a scale on a MotionController component, the scale of the parent of the motion controller component is ignored. ...

Major performance drop with instanced meshes since PhysX 3.4 upgrade

UE - Simulation - Physics - Mar 15, 2017

Major performance drop with instanced meshes since PhysX 3.4 upgrade Regression: YES Worked: 3172292 (4.13.2) Broken: 3249277 (4.14.3) For me, my results were: 4.8 through 4.13 No Collision - ...

The "Random Integer in Range from Stream" returns the same value if the seed is power of 2 of anything above 22.

UE - Foundation - Core - Aug 7, 2019

When using the "Random Integer in Range from Stream" where the seed is a power of 2 after a certain point (2^22) the random integer that is returned is the always the same. If the seed is 2^23 + 1 i ...

'Skip Assigning Gamepad to Player 1' routes MotionController input to non-vr player

UE - Gameplay - Input - Jan 4, 2020

Motion controller inputs get routed to non-vr player when 'Skip Assigning Gamepad to Player 1' is enabled. ...

Opening Editor preferences window while simulating and pressing Play/Stop causes memory leak

UE - Foundation - Core - EditorLoader - Feb 3, 2020

An open but minimized Editor Preferences window causes a memory leak while simulating and repeatedly pressing Play/Stop. ...

Game thread anim task evaluation can happen on first frame update even when bTickAnimationOnSkeletalMeshInit is unset

UE - Anim - Runtime - Anim Blueprints - Nov 28, 2024

The bTickAnimationOnSkeletalMeshInit should prevent a game thread update of the anim instance on the frame that a mesh is spawned.  However, a bug in RefreshBoneTransforms is resulting in a game thr ...

Pausing simulation in PIE does not pause looped timers on the Server when players is set to more than 1

UE - Networking - Feb 4, 2016

Pausing simulation in PIE does not pause looped timers on the Server when players is set to more than 1. The Client pauses the timer as expected. With only one player, timers are paused as expected. ...

Dragging to the content browser from an open import selection window will cause an assertion crash

UE - Editor - Content Pipeline - Import and Export - Jun 21, 2016

Using a very specific way of importing an FBX will cause a crash assertion that closes the editor without opening crash reporter. Essentially when using the import button in the content browser and ...