We have been thinking of making an ocean mat. And if we did make the ocean mat, we would probably also make a beachhead.
But we don't feel that we can make a mat that represents water in the same way that we make our other mats. So when and if we make one it will probably come pre-painted. Why? Because I think, to make it look realistic, we would need to have a painted bottom layer and a thicker clear layer on top. And also some white wave foam painted over that.
So, it would be very different than anything we've made before and it's going to require some extra experimentation to see what works and what doesn't work. And at this point we haven't yet done anything except think about it.