I want to achieve that same transparent material. As you can see they are two waves, one over the other. One wave is dark gray, and the other one is light gray. I want these two waves to move the opposite waves, like one moves to the right and the other one moves the the left and then return to the start point in a "smooth" way and repeat. I only need the guide on how to make the animation, the materials are not a problem. Thanks in advanced.