Farrier
says
What I love about todays XKCD is that even if I cross my eyes, to visually overlay a copy of dark-bg over light-bg... the dark-bg dress is still perceived by my brain to be considerably lighter.
Farrier
says
That is, even when the two are, so far as some part of my brain is concerned, overlapping, rather than many inches away.
Farrier
says
Suspects there might actually be a reason for that... But if you have them overlapping, how can your eyes tell which is which?
Sneaky bugger used the same blue, and grey for the dress...
What's the rollover?
Farrier
says
Exactly, JigmeDatse - though they're only visually overlapping, because I'm crossing my eyes. So to my conscious brain they overlap, but clearly my visual centre is doing some pre-processing per-eye.
Farrier
says
title="This white-balance illusion hit so hard because it felt like someone had been playing through the Monty Hall scenario and opened their chosen door,
Farrier
says
only to find there was unexpectedly disagreement over whether the thing they'd revealed was a goat or a car."
Farrier
says
I don't think anyone cares about the dress: they care about the illusion. And I like this secondary cross-eye illusion 
That was exactly how I saw the whole so-called controversy, was more about the illusion than the dress itself.
