Unreal Engine Issues

Mobile Preview dynamic shadows not showing on Mac

When Using mobile preview in the 4.7 preview build, or in the changelist provided, Dyanmic lighting is not showing shadows when changed to movable. Following the steps below, you will see no shado ...

AI MoveTo Blueprint node will zero velocity on Pawn when called, causing a freeze if the Pawn is already moving

AI MoveTo Blueprint node will zero velocity, causing a stop when a new destination is set if the Pawn is currently moving. Regression: Yes Worked: 4.12.5 (CL 3039270) Broken: 4.13.1 (CL 3142249) F ...

Contact Shadow artifacts with ray lengths despite length

Contact Shadows have more shadowing errors with lower to mid values than in 4.13 release when the feature was still considered experimental. Even low Contact Shadow Length value is causing issues. ...

SWorldPartitionEditorGrid2D causing editor to crash

Ribbon Emitters Do Not Properly Kill Trails On Source Loss

"Dead Trail on source lost" doesn't seem to work consistently. This is apparent when the source emitter's duration is longer than the particles being emitted. This bug also occurs if there is vary ...

Dragging the Translation Widget in Perspective Viewport on Mac in a second monitor does not translate the selected Actor

Dragging the Translation Widget in Perspective Viewport on Mac does not translate the selected Actor, and when dragging is released the cursor is moved to the top left corner of the Viewport. Happen ...

BSP brushes get Clipped or Disappear relative to the Surface Normals of a nearby Brush when Deleting/Flipping Faces

While testing this issue it was interesting to discover how the surrounding BSP's were affected. They seemed to clip/disappear according to the surface normals of the deleted brushes. There is a si ...

Rendering out PNG Sequence from Matinee yields Transparent PNGs

When rendering a movie out as a PNG sequence, the PNGs are all rendered with Transparency and require the addition of a Black layer before the frame can be viewed as in the Matinee. Went back and t ...

Random Number Generated in Constructor Returning Different Value on Begin Play

When generating a random number using FMath::RandHelper() in the constructor of an actor, attempting to print that same number on BeginPlay returns a different value than the constructor. However, ...

"Convert to Blueprint" removes ability to edit component properties

As noted by the user in the linked UDN question, this seems to be a problem with the PointLightComponent property on APointLight not having the VisibleAnywhere property descriptor. Also as noted, th ...