You can make the water ripple under an object if you're using normals (put a
shape just .0001 above the water, and give it a different normal. It takes
a little work to get the right look). Unfortunately, as has been mentioned,
normals are not nearly as good looking as a heightfield or a isosurface of
the same function. I think I have an animation somewhere that sows a normal
ocean with a rippling object...Let me see...

-S
5TF!

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