Unreal Engine Issues

Light shaft smear color due to TAA bleeding

See https://udn.unrealengine.com/questions/553031/volumetric-fog-bug.html?childToView=554676#answer-554676 ...

Atan2() missing from Math Expression node

Using the math expression Atan2(y,x) inside of a math expression node results in an error.  Tested in:  4.23.1 CL#9631420 ,  4.25 CL#11341939 ...

Landscape Grass scale not applied when min and max are same value

If min and max scale are the same in a LandscapeGrassType asset, scale will not be applied. Confirmed in 4.25 MAIN @ CL 11318998 ...

Ambient Occlusion decals ignore Receive Decals setting on meshes

Adding an ambient occlusion decal material to a decal affects objects with "Receives Decal" disabled. Tested in: 4.23.1 CL#9631420 4.25 CL#11341939 ...

High intensity pixels create artifacts with Bloom

Widget With Spinbox Crashes When Destrcutor Is Called With Multithreaded Destruction Enabled

When a widget with a spinbox is calls it's Destructor with "Multithreaded Destruction" enabled the engine crashes. I have tested in 4.23.1, 4.24.3, and 4.26 Main with "Multithreaded Destruction" dis ...

Skeletal mesh LOD 0 "LOD Info" loose their settings when we reimport

Set critical because loosing settings is dangerous. This is not a regression, the bug is in 4.22 and earlier version. We have to save all options of the LODInfo, currently nothing is saved. Also sh ...

Material slot names are lost when merging SkeletalMeshes

When we use the FSkeletalMeshMerge utility, material slot names are lost on the resulting mesh. We should at least transfer the first slot name found for a given material. ...

Clothing Simulation popping

Make FBX scene importer available in python

Its important to allow import scripting workflow ...