Array inputs on event dispatcher cause a compiler note.

UE - Gameplay - Blueprint - Apr 13, 2017

Looks related to [Link Removed], but it appears that something was overlooked. Probably requires a similar fix for the delegate node. ...

I get a compile error when using Particle SubUV nodes and tessellation.

UE - Niagara - Oct 6, 2021

I think tessellation will be discontinued in the future, but I will report it just in case. The licensee is not keen on fixing this problem. ...

IsDataValid is not called on components inherited via the Simple Construction Script

UE - Gameplay - Blueprint - Oct 7, 2021

IsDataValid is not called for components inherited via a parent's SCS. I've attached a small repro project. (4.27) ...

Datasmith incorrectly imports 3Dxml files

UE - Editor - Content Pipeline - Datasmith - Importer - Apr 1, 2022

Datasmith incorrectly imports 3Dxml files. In 4.27 and Early Access 2 the file imports correctly. ...

Crash when getting input action value from a component

UE - Gameplay - Input - Nov 30, 2022

NOTE: I have been unable to repro this locally, but the crash is because of a null de-reference so we can at least add that to fix up the issue for them.  ...

Parameters end up associated with the wrong layer after certain material layer swaps

UE - Rendering Architecture - Materials - Mar 6, 2023

The licensee has also provided an explanation as to why this issue occurs + guidance for a potential fix. Please see the UDN for more details. ...

Game does not exit when exited through SteamVR UI

UE - Platform - XR - Oct 13, 2016

Previously the game would crash (see: [Link Removed]), but the fix now keeps the game running without VR instead. ...

LandscapeComponent generates incorrect OccluderVertices for software occlusion

UE - LD & Modeling - Terrain - Landscape - Sep 17, 2019

OccluderVertices didn't consider the subsection's transition, so the position of the OcclusderVertices are not correct. I made a fix as follows: [Image Removed] [Image Removed] ...

>1ms increase in frame time with showflag.translucency , despite minimal translucency in the scene

UE - Graphics Features - Sep 2, 2021

Licensee reports this change, and can confirm a very rough similarity observed in a template project in 4.27: [Image Removed] ...

Collision between Vehicles and Instanced Meshes are behaving differently than expected

UE - Simulation - Physics - May 20, 2022

This is a regression tested in //UE4/Release-4.27 CL18319896 Vehicle from the Vehicle template clips through instanced meshes, and can't be driven on them.  ...