In gameplay camera, distinguish turning lerp speed from righting lerp speed. Reduce righting lerp speed.

vfx/gameplay_camera.gd

@@ -9,6 +9,7 @@ class_name GameplayCamera extends Camera3D
 @export var allow_losing_target := false
 @export var follow_lerp_speed: float = 0.99
 @export var turn_lerp_speed: float = 1.0
+@export var up_lerp_speed: float = 0.99
 @export var fov_lerp_speed: float = 0.999
 @export var clip_margin: float = 0.5
 @export var gimbal_margin: float = 0.75
@@ -22,6 +23,7 @@ class_name GameplayCamera extends Camera3D
 @export var analog_zoom_sensitivity: float = 1.0
 
 var target_direction := Vector3.ZERO
+var target_up := Vector3.UP
 var look_impetus := Vector3.ZERO
 var look_velocity := Vector3.ZERO
 
@@ -135,12 +137,12 @@ func _try_go(where: Vector3) -> void:
 func snap_to_target() -> void:
 	if !target: return
 	target_direction = (
-		-target.global_basis.z - target.global_basis.y/2.0
+		-target.global_basis.z - target_up/2.0
 	).normalized()
 	_follow_target(0.0, true)
 
 func _gimbal_check() -> float:
-	return target_direction.dot(target.global_basis.y)
+	return target_direction.dot(target_up)
 
 func _follow_target(
 	delta: float,
@@ -155,11 +157,11 @@ func _follow_target(
 			top_speed = (target as Character).get_top_speed()
 	var decentering: float = target_distance*target_decentering_factor
 	var leveling := (
-		target_leveling_bias*velocity.project(target.global_basis.y)
+		target_leveling_bias*velocity.project(target_up)
 	)*delta
 	var target_position := (
 		target.global_position +
-		decentering*target.global_basis.y +
+		decentering*target_up +
 		velocity*delta +
 		leveling
 	)
@@ -172,9 +174,13 @@ func _follow_target(
 		1.0 - (1.0 - follow_lerp_speed)**delta
 	))
 	if !is_zero_approx(1.0 - abs(_gimbal_check())):
+		target_up = target_up.slerp(
+			target.global_basis.y,
+			1.0 - (1.0 - up_lerp_speed)**delta
+		).normalized()
 		var desired_basis := Basis.looking_at(
 			target_offset - leveling,
-			target.global_basis.y
+			target_up
 		)
 		global_basis = desired_basis if snap else global_basis.slerp(
 			desired_basis,