You can change the appearance of the surface of the water by going to Surveyor mode, click the Main Menu button upper left corner, select Edit Environment and click the sun icon. Water surface can be set to:
calm
choppy
glassy
rippling
rough
very rough
Very rough setting, for me, goes crazy if I'm in OpenGL. DirectX is ok but then I can't read alot of the text in instruction windows. So I stay in OpenGL and NO very rough water.
Bob Weber