My favourite childhood game, also called Lunar Ball in Japan. Vote up, please! :)
Recommended settings:
Layer Distance: minimum or about that, so balls won't float :)
Light Dir: Top, and lower the Light Intensity, That way, the table would be lit "from above".
Video (attention: my actual version is shown from 01:19 until 07:20! :) At other times, I'm showing unedited version and speaking about it!)
Lunar Pool 3DN file download