Alembic Caches Not Working With Lumen

UE - Graphics Features - Lumen - Jan 20, 2022

It appears that Alembic caches do not influence Lumen's indirect lighting (except for shadowing). Alembic geometry caches should influence lighting in Lumen as any other geometry in a level. I hav ...

Changing Frame Buffer Pixel Format to Float RGBA makes the editor color look greyed out.

UE - Virtual Production - Rendering - Color - Jan 20, 2022

Changing Frame Buffer Pixel Format to Float RGBA makes the editor color greyed out with a faded look. This is not a regression it is occurring in 4.27. ...

IOS mouse pointer / cursor support

UE - Platform - Mobile - Jan 20, 2022

Niagara Dynamic Parameters do not reflect layers in material instances.

UE - Niagara - Jan 19, 2022

The names of dynamic parameters in material layers do not seem to update from material instances.  ...

Dependency tracking of external actors broken when using python

UE - World Creation - Worldbuilding Tools - OFPA - Jan 19, 2022

Licensee reports dependency tracking using Python doesn't work with WP since it relies on external actors. ...

Deleting a Sync Marker created by an Animation modifier deletes all Sync Marks made by the Animation Modifier

UE - Anim - Jan 14, 2022

Using the delete key or context menu to delete a single sync marker created by an Animation Modifier deletes all sync markers created by the Animation Modifier. If all the markers are deleted, and ...

Adding a key to an Absolute transform section will accumulate an extra transform offset when a transform override is set on a sequence.

UE - Anim - Sequencer - Jan 13, 2022

The keyed transform value will have the origin offset applied to it when it should not be.  ...

Creating a function with parameter type TEnumAsByte<MyEnum> will crash while compiling

UE - Editor - Workflow Systems - Jan 11, 2022

This is a regression.This does not affect UE5. Creating a function with parameter type TEnumAsByte<MyEnum> will crash while compiling. In 4.26 and UE5 the code compiles without issue, and the user ...

BulkDataManifest asset is non-deterministic

UE - Foundation - Core - Cooker - Jan 11, 2022

FPackageStoreBulkDataManifest:: Data ** is not sorted. It generates a difference, Here's a workaround void FPackageStoreBulkDataManifest::Save() { TUniquePtr<FArchive> BinArchive(IFileManager:: ...