Unreal Engine Issues

AbsoluteWorldPosition and PDO not working correctly in SingleLayerWater calculations

The licensee has provided a recommended fix for this issue. Please see the UDN.  ...

Animations do not play correctly when scrubbing at high speed while in Keep State.

If you check the attached GIF, you will see that when you jump the playback position, the animation stays in the same state as before the jump. I suspect this is a specification, but the user is req ...

Area Lights casting Specular regardless of material specular value

The rectangle lights ignore the specular value of lit materials and will apply a specular highlight to them regardless of the value. you can compare the result against a standard point light and you ...

Crash in PackagedBuild when using GPU & Data Interfaces

Due to module initialization order we are serializing shaders before the Niagara module has started up.  This means we are unable to find the default data interface for the GPU simulation to seriali ...

Solidworks exporter does not support scale, scene orientation is different from CAD import and materials are missing

Notice that the udatasmith geometry does not have the scale : all volumes are identicalNotice that the udatatsmith scene is rotated of 90 degree compare to the CAD sceneNotice udatasmith does not have ...

In-Editor Tutorials are unresponsive when selecting them

@triage need approval to submit this into 4.27.2 When trying to select any of the tutorials in the editor, all of them except for the "Welcome to the Unreal Editor" tutorial are unresponsive. They ...

REINST classes are available in the class reference drop down

This doesn't seem to occur every time I run the editor, I can't get it to repro consistently Note: It is possible that this is happening in blueprints based off of a native c++ class has been rel ...

There's no motion blur on streaming GeometryCache

UDN customer mentioned: "there looks to be support for motion vectors as exported from DCC apps (for rare cases like fluid sim), but regular in-engine motion vector calculation for regular motion bl ...

Groom + RT refraction not working correctly

Oculus Quest "Reset View" command doesn't work with OpenXR

upd. Regression was checked on //UE4/Release-4.26 CL 17626593 Issue wasn't reproduced. Regression - Yes ...