Unreal Engine Issues

Screen Probes and Specular Firefly Flickering near screen edges

Lumen's rough specular indirect lighting buffer can have fireflies along the bottom and right edges of the screen. Also tested in //UE5/Main, CL: 35177423 ...

LIVE: Print string not working when nav mesh bounds volume information is pulled up

After place a Nav Mesh Bounds Volume into a level, launching the game and pressing the [ ' ] key to show information about the Nav mesh the print string stops working. If the User closes the game w ...

A Pass-by-Reference function input cannot accept a reference to Self

A Pass-by-Reference function input cannot accept a reference to Self. Workaround: Cast from Self to the desired class and use that for the function's input. ...

Looking at several BPs during play, that add multiple static meshes in construction script, drops the FPS

Looking at several blueprints during play, that add multiple static meshes in their construction script, drastically drops the FPS. As a workaround, I suggested to the user that he should use Insta ...

Crash when unplugging the Oculus Rift HMD while level is loading

If the user unhooks their Oculus HMD (USB cable) from the PC while a level is loading the editor will crash ...

After loading a SubLevel from the PersistentLevel of WorldComposition, the offset of WorldComposition is applied when loading the SubLevel alone

When loading a Sub Level from the Persistent Level of World Composition, the offset of WorldComposition is applied when loading the Sub Level by itself. The offset can be applied repeatedly when rel ...

Scrubbing material roughness value in MI causes large frame drops

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. ...

Structure variables in Child Blueprints do not maintain the default values set in their Parent Blueprints

Values changed to an inherited Struct variable in a Child Blueprint will be kept after compile, but any not changed will be set to 0s. ...

Emitter Delay Range will only recalculate each loop when Emitter Duration is checked True

To have a Particle System use an Emitter Delay Range that is chosen on each loop of the emitter, you must have under Duration, Duration Recalc Each Loop set to True. ...