Unreal Engine Issues

City Sample - Parked Cars, Traffic, and Crowds do not spawn while in PIE

Repro Rate 10/10 Issue is a Regression as it doesn't occur in 5.1 Parked Cars, Traffic, and Crowds spawn in as expected when launching the project in Game Mode or a Packaged Build Going into the ...

Orthographic Rendering - Lumen Reflection Artefacts

Nanite flag is set to Enable for all static mesh materials when Nanite Tools is opened

The expected result is that the Used with Nanite flag is enabled when Nanite is enabled in Nanite Tools. Currently, opening Nanite Tools enabled the flag even for non-Nanite meshes. ...

Window to select Skeletal Mesh does not pop up when editing a new IK asset

When opening a new IK rig, the window that prompts the user to select a skeletal mesh does not open immediately. However, a skeletal mesh can still be selected in the details panel in the IK window. ...

Crash after generating HLODs for approximated meshes that have all triangles culled

The crash occurs when FWorldPartitionHLODUtilities::BuildHLOD attempts to build an approximated mesh that has all of its contents culled during generation, this can happen when an approximated mesh ...

Foliage instances don't move with a static mesh when it is shared between two foliage actors

From Licensee: The bug comes from the call of the function `FoliagePartitioningUtils::Update` in the method `AInstancedFoliageActor::MoveInstancesForMovedComponent`. When the function `FoliageParti ...

Rendering sequence with livelink data has issues with smooth engine offset

[Link Removed] for reference Playing back a sequence shouldn't have buffered samples. We should have a single one, which was built from the sequence. We need to make sure when played back that it ...

Crash when calling UPoseableMeshComponent::CopyPoseFromSkeletalComponent() from Actor's Tick while unregistering

Under certain conditions, it appears that the function UPoseableMeshComponent::CopyPoseFromSkeletalComponent may crash because the BoneSpaceTransforms obtained from the source component are empty, p ...

Orientation Warping is rotating the mesh incorrectly on listen servers

See UDN for details: [Link Removed] ...

RPCs can still be called on torn off actors

Because UNetDriver::ProcessRemoteFunction does not check if the actor has been torn off, it's possible for the server to send a RPC for a torn off actor if it still exists on the server and client. ...