LFOs 1 & 3 - background noise change (this for example is where a lag processor module would be nice)
LFO 2 - Water drop speed (triggers Env1 & Env2)
LFO 4 - umbrella water drop speed (triggers Env3)
Env1 - water drop AM
Env2 - water drop filter FM
Env3 - umbrella water drop AM

Joystick Mode 1: Ambient rain/wind filter FM/Resonance
Joystick Mode 2: Water drop & umbrella drop speeds & volumes, plus ambient rain volume and subtle filter frequency   (i.e. the harder the rain, the faster and louder the raindrops and the louder (and slightly higher) the ambient rain)

https://soundcloud.com/paul-schilling/rain-drops-umbrella
I am ready for spring, please
Printemps, s'il vout plait

I'm working on an abstract piece at the moment.  I was listening to la legende d'Eer by Xenakis and about 20 mins in are some sounds that seem like they might work in my piece.  Then, browsing here, I see these patches, that sound very close too :-)  I'm going to tinker myself and then see how you've done this.  Thanks!

thanx!!! i look forward to putting this to use.