BT LookAt - use stock UBTTask_RotateToFaceBBEntry

TL;DR: Unreal Engine ships UBTTask_RotateToFaceBBEntry. It covers LookAt + TurnInPlace use cases. Use it.

Pattern

1. In your BT graph: right-click → Add Task → "Rotate to Face BB Entry".
2. Configure:
   • BlackboardKey: a Vector key (target location) or Object key (target actor).
   • Precision: degrees of yaw tolerance to count as facing.
3. Task returns Succeeded when the agent's rotation is within Precision of the target direction.

The stock task uses the AIController's SetFocus / ClearFocus mechanism so the pawn's rotation continues smoothly even after the task ends (if you want that, use UBTService_DefaultFocus to keep focus while a parent node is active).

Why we didn't ship LCM_BTTask_LookAt or LCM_BTTask_TurnInPlace

Both planned variants do exactly what UBTTask_RotateToFaceBBEntry already does:

• LookAt: rotate-toward-target with interp speed → stock task has built-in smooth interp via the AIController focus system
• TurnInPlace: constant-rate rotation toward target → stock task supports configurable interp rate

The LCM Nav3D StateTree variants (FLcmSTTask_LookAt, FLcmSTTask_TurnInPlace) are shipped because StateTree on 5.2 has no stock rotation task - but BT has one since 4.x.

When to write a custom LCM Nav3D rotation task

The only case where stock doesn't work: you need physics-integrated banking matching the flying-pawn locomotion style. That's already integrated into LCM_BTTask_FlyTo's rotation phase. If you want LookAt-without-translation but WITH banking, fold it into FlyTo with a tiny step size or use the StateTree variant which does have banking-aware rotation.

For >95% of "face the target" use cases, stock UBTTask_RotateToFaceBBEntry is the right answer.