Adding Megascans 3D objects to a scene can cause Twinmotion to freeze and Crash on macOS.

TM - Core - Dec 11, 2024

Looking at the logs when it happened, the logs are spammed with the following: [2024.12.10-20.34.12:438][514]LogZenServiceInstance: Display: Unreal Zen Storage Server HTTP service at [::1]:8658 sta ...

Audio Attenuation falloff is applied even when turned off when called in Blueprints

UE - Audio - Aug 24, 2018

The Sound Attentuation is not ignored when disabled as audio played from a Blueprint. Tested in 4.19.2 (CL - 4033788), 4.20.2 (CL - 4302132), 4.21 (CL - 4313833) ...

Datasmith imports glossiness Texture as a Normal Texture

UE - Editor - Content Pipeline - Datasmith - Exporters - Sep 6, 2018

The Datasmith Importer for 4.20 (4.20E2) imports Glossiness Textures as Normal Maps. This is a regression from 4.19.2 (0.182) as Glossiness Textures were imported as World Textures ...

Crash generating grass for landscape with XY offset map

UE - LD & Modeling - Terrain - Landscape - May 8, 2015

Landscape grass map generation crashes if the landscape component in question uses an XY offset map. --------- Fatal error: [Link Removed] [Line: 646] Rendering thread exception: Fatal error: [Lin ...

Can not change source paths on Datasmith Scenes

OLD - Enterprise - Aug 20, 2018

You are unable to change the filepath for Datasmith Scenes. The '...' box is there for you to select but it does nothing when clicked. This issue happens in both 4.19.2 (0.182) and 4.20.1 (4.20E2) ...

[Feature Request] Select Node should allow you to right-click and reset a value pin back to a wildcard

UE - Gameplay - Blueprint - Jan 12, 2018

There is an issue where the Select Node does not Reset wildcard values for its pins. This issue does not appear to be a regression Versions Tested: 4.17.2 - 3658906 4.18.2 - 3794801 4.20.0 - 381396 ...

Component default data can be lost for a non-nativized Blueprint class that inherits the component from a nativized parent Blueprint class.

UE - Gameplay - Blueprint - Sep 5, 2018

This is a regression that was introduced by the fix for [Link Removed]. The fix makes an invalid assumption that instances of components whose archetypes are inherited by a non-nativized child Blue ...

Check hit in FNetworkObjectList::MarkActiveInternal for dormant actor after seamless travel

UE - Networking - Nov 15, 2023

When seamlessly traveling, FNetworkObjectList will have its data cleared. However, because FNetworkObjectList::Reset is called before FNetworkObjectList::ResetDormancyState, AllNetworkObjects will b ...

Unable to compile Runtime plugins

UE - Foundation - Cpp Tools - Plugin System - Jun 27, 2018

Attempting to package a runtime plugin in 4.20 results in the following error: ERROR: System.IO.DirectoryNotFoundException: Could not find a part of the path 'D:\Unreal Projects\4.20\PluginTest\Test ...

Removing a parameter from a blueprint function in a library can cause actor classes calling it to lose their parent or instance data

UE - Gameplay - Blueprint - Oct 4, 2018

Compile errors caused by an actor calling a function with something hooked up to a removed parameter can cause that actor to lose it's place in the hierarchy. Typically, the actor will be fixed once ...