I dunno, I just think something sitting in the water would have looked nice, and so I tried a sphere, and I didn't like it, I tried a pyramid, and I didn't like that. A 'berg' or mountain wouldn't look good sitting in the water, so I tried an egg shape. Anyway, pleased with those two. My first one was kinda creepy. It was like marbles floating in an abyss. Hehe...