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# ...

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: TaskDataArray.Num() == Exporter->VolumetricLightmapTaskGuids.Num()

Rendering - Oct 2, 2017

This is a trending crash coming out of the 4.18 Previews. Users have not provided any descriptions of their actions when the crash occurred, but at least two of the affected projects are being creat ...

Project deadlocks when using FClassFinder to find an AnimInstance UObject

Core - Jun 19, 2018

The project hangs on load when using ConstructorHelpers::FClassFinder to find an AnimInstance UObject. ...

[Landscape] only returns DefaultPhysicalMaterial when run in editor world

Tools - Landscape - Jun 19, 2018

Landscape will only return "DefaultPhysicalMaterial" when run in editor world. In game time it will return the proper physical material. Found in 4.19 CL# 4033788, 4.20 Preview 3 CL# 4135216 , 4.21 ...