I'm thinking the "fuzziness" you get in Bryce is coming from the volume of what seems to be a cloud material. I'm going to further assume that the look you desire is what what be considered some kind of "spray" coming off the water from its motion... So it's not "fuzz" you want, but mist...

I would try just using a basic water for the main object, and engulf it in fog... Sounds tricky?!? I haven't started yet... Take a fog object, scaled down, and surface replicate it over the water object. Use a "small" object, so that it appears very close to the -skin- of the water object. A large fog object would distance itself from the water object, and would look more like fog than the waters mist. You'd want a low density fog, w/ a somewhat randomized placement...

Theres room for a lot of play in that technique (w/ regards to how to set the water material and how to set up the fog and the surface rep), and I'm only theorizing, as I don't have the actual object to use...

Carrara does not have volume shaders, it's gonna be a tuff trick to pull off =/

Best of luck...

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