There was a steady drizzle today..
The interesting bit is that on one side, I could see the rain falling, on the other, I couldn't.
Somewhat counter-intuitively, since on the one side, a distant and dirty window was obstructing the vision, whilst on the other I had cleaned the window a few times (within only a few years :) but still, I happened to have given it a quick wipe recently).
Somehow the interference between the dirt patches and the rain texture ("textile") was by a lucky coincidence more visible - perhaps hitting a threshold - from a certain distance than the rain itself.
Not sure how, but this crucial piece of information must by absolute certainity turn to good use someday :))