GPU Particle Initial Color With Distribution Constant Curve Will Not Transition Between Points

Rendering - Cascade - Jan 24, 2019

GPU Particles will only use the first point of an Initial color module with Distribution set to Constant Curve. Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.222 CL# 4768593 ...

Using "Select Actors using this Asset" in ActionRPG on some assets causes incorrect actor to be selected

Docs - Samples - Jan 23, 2019

Using the "Select Actors using this Asset" option in ActionRPG causes the InstancedFoilageActor to be selected incorrectly for many assets. It seems to occur with any assets that are being reference ...

Cannot access data table columns by property name in a nativized build if the table's row type is set to be a user-defined structure.

Gameplay - Blueprint - Jan 22, 2019

UDataTable::FindTableProperty() will currently fail in a nativized build because the RowStruct is no longer a UDS in that context; instead it is converted to a native UScriptStruct type. However, th ...

Duplicating an Instanced UProperty Component copies a reference, instead of a "deep copy"

Gameplay - Jan 21, 2019

Duplicating a UActorComponent that has an Instanced UPROPERTY does not perform a deep copy of the instanced property. It appears to only copy a reference to the instanced object. Where as, performin ...

Niagara System User Parameters Resetting After Closing the Editor

Rendering - Niagara - Jan 18, 2019

Niagara System user paramemters will reset upon restarting if they are used in a Blueprint. This also occurs to the system if you move the blueprint after making changes then pressing Ctrl+Z.  Foun ...

Renaming a folder that contains a read-only asset from the Sources Panel causes the Content Browser and Sources Panel to desync

Tools - Jan 17, 2019

Renaming a folder that contains a Read-only asset from the Sources Panel causes the Content Browser and Sources Panel to desync. This causes the original folder (which should still exist since the E ...

Ensure on open if custom Project Setting has a reference to a Blueprint that constructs an object

Gameplay - Blueprint - Jan 16, 2019

An ensure is thrown when opening a project if a custom Project Setting has a reference to a Blueprint that constructs an object. The ensure can be found in the Callstack section below. Regression?: ...

GPU Particle Preview Flickering with Distance Field Collision

Rendering - Cascade - Jan 15, 2019

When switching from Scene Depth Collision to Distance Field Collision for a GPU particle system the preview window flickers, but returns back to normal when switching back to Scene Depth. Found in ...

ComponentSweepMulti returning incomplete HitResults

Physics - Jan 14, 2019

ComponentSweepMulti sweeps each shape of a component, however resets OutHits at the start of a new shape, losing the prior hits, only returning the hits of the last shape swept. This is a regressio ...

Crash when audio device is unplugged and the audio mixer engine is in use

Audio - Jan 11, 2019

The Editor crashes when using the new audio mixer and adding/removing a USB headset to the PC. ...