[redko]

If you texture the shoreline how you want it lets say a sandy beach then go to map_c and using the smudge tool you can gently pull the colours off the beach and stain the water the same colour but diluted,
this takes a bit of practice but its another way of getting 2 water colours and then you can blur that with a water texture tile and smudge it to create a bit of depth

Ok will chek that.