Unreal Engine Issues

Some Niagara Fluid systems render black with 'Extend default luminance range in Auto Exposure settings' enabled with SunSky

Some Niagara Fluid systems render black with 'Extend default luminance range in Auto Exposure settings' enabled with a SunSky in the level. ...

[AI] Gameplay Debugger input stops working when using console command to open debugger after opening the debugger with Apostrophe.

Movie Render Queue Deferred Lighting(Detail Lighting) only outputs Lighting Only

This is not a regression. Tested in //UE4/Release-4.27 CL#18319896 Movie Render Queue Deferred Lighting(Detail Lighting) appears to only output Lighting Only.  ...

Physical Material Mask does not appear in the Material Instance Editor

Although MaterialInstanceConstant has a physical material mask and physical material mask map property, these properties does not appear in the Material Instance Editor's details panel. ...

Add World Rotation applied to a Static Mesh simulating physics behaves erratically 

This is a regression. Tested in //UE4/Release-4.27 CL18319896 Add World Rotation applied to a Static Mesh simulating physics behaves erratically. ...

Widget Blueprints Fail to Compile When Copying Collapsed Graphs into Functions

Collapsed blueprint nodes that are copied and pasted into a function graph of a Widget will cause a fatal error when the blueprint compiles, as seen in the callstack, and will provide the message: " ...

Nesting a Structure in another Structure results in a 'Cannot parse value'

This is a regression. Tested in //UE4/Release-4.27 CL#18319896 Nesting a Structure in another Structure results in a 'Cannot parse value' until the data value is updated. If the second structure is ...

On Instance Take Radial Damage will not receive radial damage against Foliage

Different results in //UE4/Release-4.27 CL#18319896 On Instance Take Radial Damage will not receive radial damage against Foliage. ...

Foliage instance moves in editor causes PerInstanceRandom corruption

Allowed Material Slots in the Sample Static Mesh module is not working properly.

It is behaving correctly in 4.27.2. ...