ConstructorHelpers::FObjectFinder failing to compile with UPaperFlipbook

UE - Foundation - Core - Feb 21, 2017

If ConstructorHelpers::FObjectFinder is used with UPaperFlipbook as its class specifier, compiling the code fails with the following error: Error C2664 'void ConstructorHelpers::ValidateObject(UObj ...

Masked Materials using the Forward Renderer and MSAA results in banded Gradient

UE - Graphics Features - Feb 23, 2017

Masked materials used in conjunction with MSAA and Forward Rendering results in a banded gradient which seem to correlate directly with the MSAA count variable. This is connected to the Forward Ren ...

Fix world to meters scale

UE - Platform - XR - Apr 11, 2018

Is changing the world to meters in the current 4.19 AR template project supposed to affect the world, or is world to meters only for VR projects currently? We have project where a client wants us to ...

Right click editor/Slate windows blackout after a while of repeatedly clicking them.

UE - Editor - UI Systems - Slate - Jun 8, 2022

Licensee video of the issue here - [Link Removed]  This can be worked around with this setting:  [Link Removed] However it is not a solution as this setting actually causes other programs, e.g. sl ...

Muting the top most track row is muting all track rows

UE - Anim - Sequencer - Jan 27, 2023

The workflow above is generally used to pull out key poses from a mocap performance. It works on 5.0. It can be simplified for QC into this:add some animation keys to your rigged character in Sequ ...

Editor crashes when importing alembic asset

UE - Gameplay - Aug 28, 2016

Editor crashes when importing Alembic material asset. The editor will crash once selecting the asset in Windows explorer, before the Import Options window appears. When testing this, we had an ave ...

Mouse cursor does not disappear when widget has focus

UE - Editor - UI Systems - Nov 20, 2017

THere is an issue with the Mouse cursor when using UMG with the set show mouse cursor option. after setting the set show mouse cursor off pressing a widget and giving it focus causes the mouse curso ...

Blueprint Function Reorder displays error tooltip when trying to reorder functions

UE - Gameplay - Blueprint Editor - Dec 7, 2017

There is an issue when attempting to reorder blueprints where Blueprint Function Reorder displays error tooltip when trying to reorder functions. In previous engine versions, functions could not be ...

Cloth Rendering - Optimizations cause a one frame geometry stretch when off screen cloth is teleported back on screen.

UE - Simulation - Physics - Character - Aug 26, 2021

Render optimizations are causing the cloth render data to be updated one frame too late after an off screen cloth object has been teleported back on screen. The optimisation triggers itself after a ...

Wolrd Partition Foliage Builder - Fails to build with multiple external actor folders.

UE - World Creation - Worldbuilding Tools - World Partition - Apr 1, 2025

Hello, We are building a world with world partition & a lot of nanite foliage. We want to modify out Foliage Instance grid size via the commandlet. [Link Removed] Even in a new empty level the c ...