UMovieSceneTrackInstance::GetWorld() does NOT work properly in Editor

UE - Anim - Sequencer - Mar 28, 2023

UMovieSceneTrackInstance::GetWorld() returns nullptr on Editor, so user can't use any function using WorldContext and Subsystem. The following code change may fix this issue UWorld* UMovieSceneTra ...

Parameters show up in material instances even if they're not supposed to be exposed

UE - Rendering Architecture - Materials - Feb 28, 2018

In this case, I've added inputs to a material function. That material function input uses a parameter as it's default value. [image: Inline image 1] When referenced in the shader[image: Inline ima ...

Invalidation panels can retain stale hittest data when caching is disabled/enabled

UE - Editor - UI Systems - Slate - Aug 20, 2024

Changes to the hit test grid of an invalidation panel while caching is disabled won't be respected when caching is reenabled. This can cause interactive widgets such as buttons who were set to colla ...

Opening a Niagara asset that references a disabled plugin (Chaos Niagara) can crash the editor

UE - Niagara - Jan 18, 2024

Opening a module with references to a disabled plugin can crash the editor.  ...

Moving the file location of the Editor Startup map appears to break the reference to the startup map

Tools - Nov 10, 2016

Moving the file location of the Editor Startup map appears to break the reference to the startup map. The editor fails to find the map and so does not use it for the start up map. Notes: In the ...

Changing blendspace on a blendspace player node resets the play time

OLD - Anim - Jan 11, 2017

Open QAGame and duplicate Player_RunBlend to Player_RunBlend2. Create an animation blueprint for M_Avg_Base_AnimSkeleton and set it up in the screen shot below. ( "New Var 0" and "New Var 1" contai ...

Dark Artifacts Appear On Meshes With "Use As Occluder" After Enabling DBuffer Decals

UE - Graphics Features - Feb 13, 2017

Objects set to "us as occluder" will create dark artifacts from certain view angles. For this to occur "DBuffer Decals" need to be enabled in the project settings. The licensee has noted that addi ...

Filename issue for Stick Figure Project 2D project

Docs - Samples - May 2, 2017

There is an issue packaging the project Unreal Stick Figure 2D project that is available in the learning tab. The project cannot package from the outset because of a couple of files that uses space ...

Cannot paste text into Text Box in HTML5 build

UE - Platform - Mobile - Sep 14, 2017

With HTML 5 Packages you cannot use the windows clipboard to paste things into the text box. This issue does not occur with other builds of the project. This issue does not appear to be a regression ...

Crash upon editing a GameplayTagQuery inside of a DataAsset

UE - Gameplay - Oct 27, 2017

When a GameplayTagQuery variable is edited from inside of a DataAsset, the editor crashes when the changes are saved. This could be related to a bug that was fixed previously: [Link Removed] Regres ...