Unreal Engine Issues

Editor Freezes after the user attempts to set a NewSpriteAtlasGroup to an imported sprite

By setting an Atlas Group to a newly created sprite, the editor freezes. This feature is most important, even if this issue can only be reproduced by a minority of users. Repro rate: 5/5 Notes:No ...

Allow extending World Partition streaming partition class

Lumen tile classification flicker

While we suggest using screenpercentage at 25%, it is visible at higher percentages. Video showing the flickering:https://udn.unrealengine.com/s/contentdocument/0694z00000Qw4jPAAR ...

Assert during HLOD Mesh Build with Degenerate Triangles in a Mirrored Mesh Instance

Licensee reports an issue with MeshDescription indexing when reversing a degenerate triangle. ...

MaterialBaking LocalSpace Issue

See attached project for a good repro ...

Level Instancing and Is Editor Only Actor flag

WP handles PIE Editor only properly (doesn't load the actors at all) but the old level streaming system just hides them through the FPrimitiveSceneProxy. So in this instance, the bug is that the Lev ...

Cooking crash during shutdown with no useful error

Sometimes some of actors are destroyed after the destruction of the solver through the garbage collector. In this case, the app crash in FChaosScene::RemoveActorFromAccelerationStructureImp because ...

Reference to control rig can be lost on actors with multiple skeletal mesh components

In the attached project, when we initially add a control rig track for the actor with multiple skeletal mesh components, we add the control rig for the correct component because FControlRigParameter ...

Stop using power of 2 RTs for landscape edit layers

Result : all the RTs allocated for edit layers (in global merge mode) will be padded to the next power of 2 for no good reason, which can lead to out-of-VRAM (as reported by [Link Removed]) ...

Subobject editor collapsed nodes are auto expanded when adding or moving a node

Node operations cause all of the collapsed nodes to be auto expanded. This is disruptive when working with complex hierarchies because you can't hide irrelevant components. ...