Unreal Engine Issues

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 ...

Niagara viewport does not adjust exposure when set to auto

The Niagara viewport does not adjust exposure when using the Auto setting for exposure. This is especially pronounced when using physically based values for skylight intensity.  ...

Skybox not rendering in packaged project with Vertex Fogging enabled

Vertex Fogging setting causes skybox material on large skybox mesh to not be rendered. Confirmation for 4.25 blocked by [Link Removed] ...

Placing 'Groom' asset into scene results in assertion failed

Dragging a groom asset into the level results in a crash. Link to Project: [Link Removed] Tested in:  4.25 CL#11223911 ...

Custom Profiles Don't Update Maps To Cook When One Is Deleted

If you delete a map while it is marked to be cooked in a custom profile, then run the custom profile the map won't be deleted from the profile .ulps. I wasn't able to launch using the new custom pr ...

Compiling a grandchild Blueprint via automated test can lead to crash

The crash doesn't happen if the blueprints are loaded ahead of the test by opening them, or if you compile all of them in the same test run. ...

Blueprint Variables can become re-linked to default values.

Editor resets Per instance values if the parent was set to matching one ...

ProRes 4444 files cannot be played on MediaPlayer when RHI is DirectX 12

This file can be used if you have enabled the Apple Pro Res Media plug-in. This can be played when RHI is set to DirectX 11, but not when changed to 12. The file being played is a ProRes 4444 vide ...

Light shaft smear color due to TAA bleeding

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

DFAO has ugly result on Hair Material with Custom Tangent