A random and cool idea, very well executed. I particularly like that ground texture.
Also agree with above comments about drips being a nice touch. I think the other waves in the tubs almost look too "pointy" or "choppy" though... as if they're large waves on a lake or sea rather than small calm ripples on a bathtub.
(the second paragraph may be inaccurate as I haven't actually looked at a full bathtub from an artistic standpoint, so I'm just guessing )
Thanks. Yeah the waves are probably a bit much. They are more of a choppy ocean wave scaled down. If I run a new one, I'll see what I can do about the waves. Ground texture is a bit of a cheat as it is an image map (you can see the repeat pattern if you look closely. But it is mapped to a heightfield and has other texture elements applied so it isn't just a flat image.