Holly
I have been searching furiously for a .car file of a "Bouncing Balls"  little movie I made back in Carrara5?. (Using the fountain) It was to emulate that TV add (was it for Windows?) where some one is walking down a street and balls are falling from the sky and bouncing off the road.
(You would have been able to see all the settings from that .car file)

It was pretty easy--well I did it so it must be--by following the Help manual and doing the adjusting in the regular and advanced settings. I had a range of different size and colour balls raining down from the sky using the fountain.

PM me if you would like the (very small) little movie.

Brian
PS-----A bigger movie version is 139MB

bwtr