Here's one I tried with Ulco's map on Cube a flattened a lot proportional to the width. I warped the map previous to entering the VDisp shader and found you cam get slight overhang on the waves by + or - on the X...I used -2. clip attached. If using it on a cube the map should have the same coords as the cube. The render has a close up of the waves and the shack is moved because close up i noticed rock in wall syndrome.