Cannot build a project containing a UFUNCTION that takes a pointer to a deprecated component as a parameter

Core - Jul 18, 2018

If a UFUNCTION takes a pointer to a component as a parameter, the project cannot be built if the component's class is marked as deprecated. The error message that is provided states that the propert ...

Animation FBX export is broken for ThirdPersonCharacter

Tools - Jul 20, 2018

It seems like the animation fbx exporter is broken. The mesh is exported just fine and can be imported in any application without issue. As soon as the animation is exported the mesh becomes broken ...

Cannot Parse a Custom Node as a Function Input to Another Custom Node In The Material Editor

Rendering - Aug 30, 2018

Cannot parse a Custom node as a function input to another Custom node in material editor. This is working as expected in 4.18 CL# 3832480. Found in 4.19 CL# 4033788, 4.20 CL# 4302132, and 4.21 CL# ...

Navigating the Editor on Linux with a Wacom Tablet is difficult

Platform - Linux - Sep 17, 2018

Movement is quite sporadic and jumpy when using a Wacom Tablet to navigate the Editor on Linux. The Editor pans and zooms in and out really quickly with the slightest of movements. This was report ...

Rect Light Source Creates Black Artifacts When Overlapping a Mesh While Light Shaft Bloom Is Enabled

Rendering - Nov 9, 2018

A black line will appear If a Rect Light is overlapping a mesh while a Directional Light has light shaft bloom enabled. This line will originate from where the edge of the source is overlapping the ...

UBX Collision Rotation Is Set Incorrectly on FBX Import

Tools - Dec 4, 2018

Imported FBXs that use UBX will import their collision rotation incorrectly. You can see this when scaling the collision non-uniformly.  Found in 4.20 CL# 4369336, 4.21 CL# 4541578, and 4.22 CL# 46 ...

Far Shadow Cascades fade out based on the length of the Distance Field Shadows

Rendering - Mar 14, 2019

Far Shadow Cascades are fading out based on the length of the Distance Field Shadows. Causing the shadows to cut out abruptly. ...

Actors with Niagara components don't wait for the system to finish before being auto destroyed

Rendering - Niagara - Mar 29, 2019

UNiagaraComponent does not override IsReadyForOwnerToAutoDestroy, so it always returns true. This gets checked every tick if an actor is set to auto destroy, so actors with Niagara Components do not ...

HISM Rotated Instance is Culled Whenever its Pivot Moves Out of Camera View

Rendering - Apr 23, 2019

HISM rotated instance is culled whenever its pivot moves out of camera view.  Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 CL# 5660361, 4.23 CL# 6037269 ...

[CrashReport] Assertion failed: !Export.ClassIndex.IsNull() | UPackage::Save()

Core - UObject - Sep 20, 2017

This is a somewhat common crash coming out of the 4.17 release. User Descriptionsclicked Launch->Firefox. This is the same project with in-game video-screens which has been crashing on Launch for W ...