This triptych shows three experiments in impressionistic photography (my thanks to my wife who pointed at the windshield and said "Monet").
They each share a common scene and also share one part of the technique - shooting through the windshield of a (parked) car during a heavy rain. This basically describes image #1.
Image #2 was made in a similar fashion to #1 but was done as a 9-shot multiple exposure stepping vertically between shots.
Image #3 was made in a similar fashion to #1 but was done as a slow (0.4 sec) vertical pan.
I think for what it's supposed to represent - an impressionistic painting - #3 would get my vote. Tough choice between 2 & 3 though. Depends on whether you want more (#2) or less (#3) detail. Inability to make up my mind is why the PAD is a triptych : )