Tile Illusion

I love optical illusions but if this was in my home, i'd probably lose my mind :)

Thanks Pedro, that is much clearer. And I see now why the warping only appears from the center, and not the rest of the picture is because of the repeated diamonds in the middle.

It's a clever illusion, no doubt. Although the lines are technically straight, and perpendicular to each other, this portion of the illusion is not perfectly perpendicular to the monitor (maybe it got scanned crooked), as it is has been rotated counter-clockwise by 1/2 of a degree (no, seriously). That rotation, however, shouldn't adversely impact the illusion - that the straight lines seem to be bent/curved.

The real truth about this specific illusion... the illusion is slightly crooked, but the lines are straight. Very cool.

I was bored, so created this animated gif of the illusion, with and without the pivotal pieces.

To Pangolin:
Ruin the fun why dontcha.
I think I wanna go home now, I don't feel so good.

All illusions are fake. That's why they are called illusions.

To defend SpuriousGeorge, it is a bit of a cheat not to alternate those two lines. But that's what the illusion is about. Kinda spiffy.