Is this a small cube inside a room or a big cube with a notch taken out of it?

How many books are there and are they in correct position to read??

The green is identical throughout this illusion

Is the blue line in the middle a perfect square?
It actually is, it just a spears to be slightly slanted.

Do you see a donkey or a seal below?

How many shelves to you see below?

Stare at the fixed white dot and the scintillating will stop.

See these scrap bits they will look as if they are rotating

Look at the grouping of stairs below. How can they keep climbing?

Are you lookin at inside or outside of this magazine?