Masked Materials have become more expensive to use

UE - Graphics Features - Aug 18, 2016

Masked Materials have become more expensive in 4.13 and internal builds than in 4.12. Images attached for demonstration along with test map using the bush prop from starter content. Tested with ...

UMG Viewmodel Plugin -- When setting up View Bindings, several arithmetic and comparison functions are missing from the "Conversion Functions" list

UE - Editor - UI Systems - UMG - Mar 20, 2026

When setting up View Bindings from the "UMG Viewmodel Plugin" on a Widget Blueprint, it is possible to select a compatible "Conversion Function" from the list of available bindings. By default, the ...

[CrashReport] UE4Editor-Core!static void PureCallHandler() [WindowsPlatformMisc.cpp:477]

UE - Foundation - Core - May 8, 2020

Generated from CrashReporter Error Message: Fatal error: [File:D:/Build/++UE4+Licensee/Sync/Engine/Source/Runtime/Core/Private/Windows/WindowsPlatformMisc.cpp] [Line: 475] Pure virtual function bei ...

LIVE: Editor crash on open if saved with detached viewport and sky light in level.

UE - Graphics Features - Oct 21, 2014

If there is a sky light in a scene and the viewport is detached and closed prior to saving, the editor will crash when trying to reopen the project. Crash Reporter: 431802 ...

NavMesh "Enable Drawing" option is not saved

UE - AI - Mar 7, 2015

USER DESCRIPTION: Every time I check "Enable Drawing" in project settings, save all, close the editor then open it again -> Enable Drawing is unchecked. Why? Is there some other place when this opti ...

User cannot undo the automatic changing of Mobility settings

Tools - Sep 12, 2016

When the users causes a component to automatically change its Mobility setting by changing that setting on a parent or child component, undoing that change only affects the manual change caused by t ...

Blender exported assets flip material elements on import in 4.14 P1

UE - Editor - Content Pipeline - Import and Export - Nov 7, 2016

In 4.14 Preview 1, assets imported from Blender 2.77a flip material elements, causing materials to appear incorrectly once placed in level. Regression (yes) issue (does not) occur in 4.13.2 ...

changing physics type to simulated causes bodies to simulate in phat

UE - Simulation - Physics - Jan 18, 2017

1. open qa game 2. open a physics asset with multiple bodies 3. select a body and set its physics type to Simulated. 4. Notice simulation starts immediately even though we are not simulating. ...

Editor crashes after redoing the addition of a component to a static mesh actor

Tools - May 30, 2017

This is not a regression. This also occurs dating back to 4.15 and 4.14. The editor crashes on this check in FLevelEditorActionCallbacks::Paste_CanExecute() when updating the Edit menu state: chec ...