Add ThinLTO support to iOS

UE - Platform - Apple - Jun 27, 2023

iOS link times could be sped up by adding ThinLTO support as was done for Android recently. ...

Expose atlas parameter to CurveAtlasRowParameter node as well

UE - Rendering - Architecture - Materials - Jun 12, 2023

This has been spotted and notified by a UDN user through case [Link Removed] The CurveAtlasRowParameter node exposes the Curve parameter to be overridden in derived Material Instances but not the A ...

Third person camera lag issue for vehicle in multiplayer

UE - Runtime - Character - Jun 9, 2023

There's a vehicle/third person camera stutter observed as the vehicle corners. The issue appears worse with Physics Async mode enabled, and less perceptible with this mode disabled. This video was ...

Long thin spinning objects take too long to stop spinning

UE - Runtime - Simulation - Jun 5, 2023

See the SpinningObjectStability test map in the Physics Sandbox. [Link Removed] It's not clear if this is a bug or a side effect of some of our solver shortcuts (e.g., omission of the precession te ...

Visual Noise on Thin Translucent materials with a Directional Light

UE - Rendering - Graphics Features - May 30, 2023

Regression in testing This occurs with hardware and software ray tracing, as well as moveable and static lights This occurs regardless of anti aliasing. This was tested with DX12 ...

Merge Actors Tool Simplifies Nanite Meshes

UE - World Creation - Worldbuilding Tools - Merge Actor - May 19, 2023

Tried every combination of LOD Selection Type, Nanite enanbled/disabled, the only way it would seem to get the full number of triangles from the source mesh into the merged mesh is to disable Nanite ...

LevelInstance: Brush actors don't follow transform

UE - World Creation - Worldbuilding Tools - Level Instances - May 16, 2023

WorldPartition: Attached Actors within Level Instances save level offset bounds

UE - World Creation - Worldbuilding Tools - Level Instances - May 9, 2023

The proposed fix is implemented in CL 25389340 but needs further testing to make sure there are no issues caused by it. ...

iOS ReplayKit isn't working in UE5.1+

UE - Platform - Apple - Apr 21, 2023

In 4.27 & 5.0 when you press the in-app screen recorder button it would pop-up a msg about the user giving permission to allow the screen recording and then would start the recorder and save the mov ...

Pending Abilities are always Added then Removed (thus ordering is not preserved)

UE - Gameplay - Gameplay Ability System - Apr 20, 2023

We should probably keep a Queue of the Gameplay Abilities Add/Removed rather than two separate lists.  That way we can get the ordering right.  I suspect there are lots of ordering issues if we look ...