Like all 'magic eye' pictures it is dependent on the viewer to see it. It requires a certain out of focusing ability, and some folks claim they never see them.

For those who do, there is no question about when the picture 'shows up'- it is a 3-dimensional effect.

That said, this particular picture is a little harder to see than most. Maybe because it is so flowery.

I drew a woman's face and hair and cedar chest beside it. I found them, no problem, but they are not as distinct as the books and calendars that I have seen.