Unable to Import Alembic Files in UE4

Tools - Import - Feb 25, 2020

We have written a plugin for UE4 that allows Unreal users to import and set up Megascans assets into Unreal Engine. Recently we added Alembic files to our assets and also updated all our plugins to ...

Foliage's Landscape Layers are not reflected when Landscape is rotated

Tools - Landscape - Feb 19, 2020

This problem seems to occur because Rotation is not taken into account when calculating Weight. I have confirmed that it can be solved by calculating the rotation as follows.float ULandscapeCompone ...

Complex collision mesh might lose its collision in the editor

Tools - Feb 18, 2020

This is affected by loading order. In the case, display mesh was loaded firstly and try to build collision mesh form complex collision mesh asset. But the collision mesh didn't finished to make Ren ...

Modified a mesh used as complex collision mesh does not affect the collision in the editor

Tools - Feb 17, 2020

When a user changes any properties (for calling PostEditChangeProperty ) in parent static mesh or restarting the editor, the modified mesh is applied correctly. how to reproduce: ComplexCM.mp4[I ...

Native struct types that declare one or more non-UPROPERTY fields are not initialized with the default value from a modified Blueprint CDO.

Gameplay - Blueprint - Feb 12, 2020

Dynamically-spawned instances of a Blueprint class go through an optimized property initialization pass (see UBlueprintGeneratedClass::BuildCustomPropertyListForPostConstruction() and InitProperties ...

Show collision can't display Complex Collision Mesh

Physics - Feb 12, 2020

"viewmode collisionpawn" and "viewmode collisionvis" can not display complex collision meshes as well. ...

Unable to input with IME in widget component.

Tools - UMG - Feb 12, 2020

Unable to input IME text in widget component, but able to input IME text in textbox like UMG designer.  It works fine until 4.21, however it wasn't able to work after 4.22. Workaround: void FSla ...

Particle System Components don't inherit owner's time dilation

Rendering - Cascade - Feb 7, 2020

This is a regression introduced by the particle system manager. It does not account for the owning actor's time dilation when ticking the particle system components.  ...

Input Key Selector's Set Text Style does not change Text Style when given Text Style Variable

Tools - UMG - Feb 6, 2020

Input Key Selector's Set Text Style does not change Text Style when given Text Style Variable ...

Reordering instanced components in the Actor Details tab invalidates the relocated instance such that it can no longer be registered into the current world.

Tools - Feb 5, 2020

After reordering, if you hover over the "Component Blueprint B" entry, the object path indicates that it's incorrectly referencing a transient object. This is why GetWorld() now returns NULL and the ...