The Reality of Virtual Reality is affected by many research areas. Therefore, individual researches must be combined to achieve the extreme goal of Virtual Reality. In this paper, we present an application of the novel and clever combination of height field wave simulation, photo realistic rendering, and a 6DOF manipulator exploiting Augmented Reality. In our system, a user can touch a virtual water surface with a real pen attached a tracking cube in natural manners. We also take into account rendering optical effects like shadows and caustics, which give users a great deal of reality. We show how such a combination is important to achieve reality in the videos of our real time demonstrations.