I recently studied this program's source code to re-create the effect in one of my games. I say, isn't that what demos are for? Demo-wise, there's not much more you could ask for, except for a little more demonstration of the affect along with other graphical output. Excellent job!

It is very nice program/demo. The water effect is always beutiful. But the author goes further, he added several options to modify the effect... very nice work...

Nice effect. The program that demonstrates it lets you tweak the paramaters of the rain-effect, but playing with rain gets a bit boring after a while. Comes with sourcecode.

Fairly neat demo, nice gui and functionality, and includes source so bonus points. Your standard nifty demo.

The rain effect is pretty neat. I wish you could make it full screen to see more detail. Being able to tweak the settings in real-time was also a nice touch.