Delta struct serialized fast arrays replicating new elements with no changelist

UE - Networking - Jun 14, 2021

There is a scenario where delta struct serialized fast arrays can replicate changes that introduce additional elements to the array, but without changelists containing the new data. This needs furt ...

Color space transform in the UI composition is incorrect on DX12 HDR (r.HDR.UI.CompositeMode=1)

UE - Graphics Features - Jun 11, 2021

Color space conversion in the UI composition is incorrect on DX12 HDR. In the main() function In CompositeUIPixelShader.usf, you can see the following color space transform.// sRGB -> RRT -> ODT ...

Update to AndroidX

UE - Platform - Mobile - Jun 11, 2021

Upgrade to use AndroidX ...

Mouse collision is offset when fullscreen at non-regular resolutions

UE - Editor - UI Systems - Slate - Jun 10, 2021

The source of the issue is differences between viewport resolution and screen resolution. Cursor position is reported w.r.t. screen space, but we need to map that value to the viewport to correctly ...

Two-Sided Material option is initially greyed out and inaccessible when creating a Material Instance

UE - Rendering Architecture - Materials - Jun 9, 2021

When attempting to change the option for Two-Sided Material for a Material Instance, the option is initially greyed out and you cannot change the value. However, if you close out of the Material Ins ...

Masked areas render as black if material uses any virtual texture

UE - Graphics Features - Jun 9, 2021

Masked materials that sample virtual texture don't function correctly. They render black instead of masked. This happens when there is no depth pre pass enabled. Automatically enabling depth pre p ...

Projects crash after enabling the Panoramic Capture plugin and restarting the editor

UE - Platform - XR - Jun 9, 2021

The editor crashes when attempting to open a project that has the Panoramic Capture plugin. Tested in //UE4/Release-4.26 @ CL 15973114 and the editor does not crash when the plugin is enabled, so ...

Expose input action from enhanced input component delegates

UE - Gameplay - Input - Jun 9, 2021

From a delegate there is no easy way to access the action that triggered the delegate. Whilst this is mostly inherent (an OnJumped handler implies the Jump action) it would be better to provide dire ...

Audio Capture Component Crashes When Unplugging Mic/Headset

UE - Audio - Jun 9, 2021

Audio Capture Component does not appear to be handling external device swaps appropriately, and has a delayed crash that will occur if an in-use mic is unplugged. At a glance, it appears to involve ...

Crash when using EditConditionHides with a struct in an array

UE - Editor - Workflow Systems - Jun 8, 2021

A crash can occur in FStructurePropertyNode::GetValuePtrOfInstance when using EditConditionHides with arrays of structs. When deleting an element from the array, ParentBaseAddress will be null. ...