概要
var result = Mathf.SmoothDamp ( current: current, target: target, currentVelocity: ref currentVelocity, smoothTime: smoothTime, maxSpeed: maxSpeed, deltaTime: Time.unscaledDeltaTime // ★ );
Mathf.SmoothDamp の第6引数に Time.unscaledDeltaTime を渡すことで
Mathf.SmoothDamp で Time.timeScale を無視できます