Optical Illusion: What do you see, zigzags or curves?

[anon61221983]

[Melizmatic]

[Woodchuck45]

I see a black and blue dress

[anon94804983]

I easily see both in this one, too.

[Amstrad]

Was going to say the same thing, here’s an embiggening that makes it clear:

[Wesley_Jones]

I see both on alternate lines, thou i assume that’s to do with the slightly different position of the shading on them.