Creating Widget at run time with an exposed variable causes Engine crash with Assertion

Tools - May 8, 2020

If you are using the default values of the In Size the project will run fine, but changing the values will make the engine crash. This was reported and tested in 4.25 (CL-13144385) and reproduced i ...

The Niagara Staticmesh data interface node Random Tri Coords doesn't respect Emitter's Deterministic Settings

UE - Niagara - Aug 11, 2021

From UDN: We are using the Cascade particle system and we want to render the same scene with multiple cameras, so multiple renders are required. In order to ensure that the result of the particle s ...

Granular Synth Component does not generate sound on non-Force Inline assets

UE - Audio - Mar 7, 2022

Granular Synth Component is not generating a sound as it previously did. ...

Chaos Vehicle does not make them CCD

UE - Simulation - Core - Jan 10, 2024

AWheeledVehiclePawn class tries to use CCD in the constructor, but Mesh->BodyInstance.bUseCCD = true this code does not work to activate CCD because Physics Assets could not be available at this ...

Unable to Import Sockets and LODs together for Static Meshes

Tools - Nov 6, 2015

When importing a Static Mesh into UE4 that is using the SOCKET_ naming, and is part of a Level of Detail set, the socket is discarded. If the Level of Detail set is removed from the Static Mesh, t ...

Text doesn't update when wrapped in a Retainer Box

UE - Editor - UI Systems - UMG - May 2, 2022

This is a Regression. Retainer box is prevent Text to update in different situations including binding the text. ...

Hot reloading with a plugin in the project prevents the project from being able to save.

UE - Foundation - Core - Jul 8, 2015

Hot reloading a project that includes a plugin will not be able to save if the plugin is used in the project. ...

Crash smoothing landscape with foliage

UE - LD & Modeling - Terrain - Landscape - Mar 25, 2016

Getting a crash when smoothing out landscape that has foliage painted on it. Seems to happen when I release the mouse. ...

Unexpected behavior resulting from overlapping or touching physics actors when Simulate Physics is enabled through input

UE - Simulation - Physics - Sep 21, 2015

Weird behavior occurs when toggling Simulate Physics on physics actors by input instead of on BeginPlay. Multiple odd behaviors are present such as touching physics actors ignoring collision. Test ...

Key "F" for Focus acts Sporadically in the Static Mesh Editor Viewport

Tools - Dec 15, 2016

In the Static Mesh Editor Viewport, hitting "F" for Focus results in placing the view camera sporadically so that mesh is not always centered and frequently out of frame altogether. Regression: Yes ...