World position offset behaves differently when setting its value directly on the result node

UE - Rendering Architecture - Materials - Jul 8, 2024

The world position offset input of the result node does not behave consistently. There is an obvious visual difference between the setting it by connecting a float3 color constant, versus setting th ...

Enabling ZenLoader causes editor crash when undoing Level Instance deletion

UE - Foundation - Core - Sep 5, 2024

Crash reported through UDN. With ZenLoader enabled, deleting a level instance and triggering Undo causes a crash in  ULandscapeComponent::PostEditUndo() The user has provided an example project th ...

Building Geometry Stops UTickableWorldSubsystem Ticking

UE - Content Tools - Jan 13, 2025

Can be mitigated by reopening the Level. There is a repro project provided by the licensee on the case ticket. ...

Performance will drop in PIE if simulate physics is toggled rapidly on an actor with attached components

UE - Gameplay - Nov 3, 2015

Performance will drop in PIE if simulate physics is toggled rapidly on an actor with attached components User Description: Simulating physics for Primitive components causes severe performance dr ...

Editor windows do not lose focus when minimized on Linux

UE - Platform - Linux - Jul 28, 2015

Using Ubuntu 15.04, editor windows do not layer correctly when minimized. Control remains with the minimized window. Ex. After minimizing a blueprint window, right clicking will still act as thoug ...

Opening a project that contains an actor in viewport with a child actor component of type TextRenderActor crashes the editor

UE - Gameplay - Blueprint - Jan 12, 2016

If a blueprint with a child actor component of type TextRenderActor is added to a level and the editor is saved, closed, and reopened, the project will crash with the following assert: Assertion ...

Custom Component class does not show up in Add Component list

UE - Gameplay - Blueprint - Mar 5, 2015

Creating a code component class and marking the UCLASS() macro with meta=(BlueprintSpawnableComponent) does not allow the component to be used inside blueprints. Workaround: Adding ClassGroup=( [Gr ...

Cannot Rename or Delete Event Dispatchers if they are named "color"

UE - Gameplay - Blueprint - Jul 21, 2015

Event Dispatchers cannot be renamed or deleted after being created if the name used is "color". ...

Instanced meshes spread further apart as size increases

Tools - Jun 22, 2015

As the size increases on instanced static meshes, they spread further apart, causing unwanted breaks in tiling. This increase is proportionate to the increase of size. Note: Despite the collision ...

This Blueprint will not compile and causes a crash in 4.8

UE - Simulation - Physics - Mar 18, 2015

The MiningBuilding Blueprint in this user's project will not compile. Clicking the compile button never switches it to "Good to Go", and a warning that it needs to be compiled appears at PIE. Repro ...