Unreal Engine Issues

Foliage painted on Mesh Terrain disappears after edits are made

Mesh Terrain recreates the visible section actors when edits are made, and those sections in the editor don't correspond to the ones at runtime, which breaks the ComponentId that the foliage system ...

Editor Crashes When Reloading Textures in Debug Tools

Crash occurs while Playing in Editor and debugging by reloading textures. Occurs for both Mac and PC. Regression: Does not occur in UE4.10 testing on Match 3 ...

Volumetric Light Fog Leak through objects

Any environment with volumetric fog enabled will have a light leak which appears through objects.  Found in 4.20 CL# 4369336, 4.21 CL# 4613538, 4.22 CL# 4666322 ...

Sequencer auto-generated thumbnails should not replace manually-catpured thumbnails.

Vertex Interpolate Node Doesn't Work with Lightmass

The vertex interpolate node doesn't work with lightmass. Found in 4.19 CL# 4033788, 4.20 CL# 4233996, and 4.21 CL# 4258917 ...

Compile error when declaring UPROPERTY() TArray with TFixedAllocator

Declaring a UPROPERTY() TArray with TFixedAllocator fails to compile. Output log states "Missing '>' in 'tarray'." Removing/commenting out the UPROPERTY() allows the project to compile correctly. ...

Contact Offset no longer appears to have an effect

When modifying the contact offset in a project it appears to have no effect. The setting that worked in a previous engine version (4.19) now collide in the same way as the default settings. ...

bStaticWhenNotMoveable in Lighting category instead of Physics

"UPrimitiveComponent::bStaticWhenNotMoveable"'s category is set to Lighting, not Physics. This causes it to be hidden when lighting-related properties are hidden, even though it controls physics sta ...

Toggling Vertex Colors on in Static Mesh Editor makes the viewport all white

When turning on the Vertex Color option in the static mesh editor, the whole viewport turns white. ...

Lighting channels are not supported with tiled lighting

Reported via UDN ...