I assume you are talking about having water ripples and waves. I suppose, technically, it could be coded in without requiring a 'bumpy' surface. However, the 'bumpy' surface idea would be very nice for incoming water (where water meets land), such as on a beach - you could just cycle the surface in a loop (like a conveyer belt). Better still how about a bit of pixel shading - but then Blitz doesn't seem to support that.
"Rob" probably knows.
"Rob" probably knows.