Inconsistent Behavior of TFieldPath and nullptr comparison

UE - Core - Systems - Mar 7, 2025

Commit 6448c6f (https://github.com/EpicGames/UnrealEngine/commit/6448c6f6d1de1e9fac9614248e06ba06b837814d) introduced inconsistent behavior for TFieldPath and nullptr comparison, depending on constn ...

[Interchange][FBX] Import of custom collision add the collision mesh material slot to the mesh material slot

UE - Editor - Content Pipeline - FBX - Jan 20, 2025

cf part 2 of that UDN https://udn.unrealengine.com/s/question/0D5QP00000rP4CG0A0/interchange-custom-collision-changes-from-fbx-pipeline?fromCase=1 ...

USD Stage - Import loses UV on a skeletalmesh with animation

UE - Editor - Content Pipeline - USD - Apr 28, 2026

https://forums.unrealengine.com/t/usd-import-issue-when-trying-to-import-skeleton-with-animation/2718449 I put another png has the user forgot to add theirs. ...

Character rotations can diverge between clients and client/server briefly under packet loss and using bOrientRotationToMovement

UE - Gameplay - Player Movement - Jun 4, 2020

At some points the rotations will diverge briefly while the client and server attempt to rotate to the orientation direction by going different directions about the rotation axis. ...

Spline Mesh Component created from KML file doesn't render in PIE after spline point change

Tools - Oct 8, 2015

Spline Mesh Component created from KML file doesn't render in PIE after spline point change I cannot get this to occur outside of the users test project. He is pulling data from a KML file, creatin ...

MS_VertexAnimationTools_MorphTargets are not deforming and reforming

UE - Graphics Features - Sep 20, 2017

The Material should be contracting and expanding if it is working correctly, but after version 4.16 it is not. Instead it is solid in appearance in the material editor viewport. Below I have linked ...

Chaos Cloth - Visualization materials cause async load flush and slows down starting a PIE session.

UE - Runtime - Simulation - Aug 13, 2024

The loading of the cloth visualization materials disturbs async loads shortly after starting PIE which causes an async flush and several seconds stall. The solution would be to move these to a sing ...

Thin translucent doesn't work with separate translucency and Before-DOF

UE - Rendering - Graphics Features - Nov 27, 2023

In-app purchase fail node does not execute properly without network connection

UE - Platform - Mobile - Sep 30, 2015

In-app purchase failure nodes do not execute when there isn't any connection. ...

Characters using NavWalking on server have noticeable jitter on clients at lower framerates

UE - AI - Aug 23, 2018

AI nav walking doesn't allow clients to set a "Base" for the character (SetBase from UpdateFloorFromAdjustment), so there is no floor result on frames where there is a net update. This causes simula ...