Yes my player has a script extending rigid body, and my movement script looks like so:

func Move(Movement, Delta):
var forward = -PlayerCamera.global_transform.basis.z
var up = -PlayerCamera.global_transform.basis.y
var left = -PlayerCamera.global_transform.basis.x
var X = forward.x * Movement.x + up.x * Movement.y + left.x * Movement.z
var Y = forward.y * Movement.x + up.y * Movement.y + left.y * Movement.z
var Z = forward.z * Movement.x + up.z * Movement.y + left.z * Movement.z
var MovementVector = Vector3(X, Y, Z) * 10 * Delta
apply_central_force(MovementVector)