Is the Harry Potter IMAX 3d actually in 3d or just a large screen?!

Is the Harry Potter IMAX 3d actually in 3d or just a large screen?

I heard it was part and part. Was it good in imax?

2 weeks ago
I know it's in 3d(it's called Harry POtter and the ORder of the Pheonix: An IMAX 3D EXPERIENCE)

20 minutes near the end of the movie are in 3d. you get glasses and these little glasses flash in green on the HUGE screen when you should put them on. they flash in red when you take them off. i highly recommend seeing it in imax 3d! it was awesome. the movie would have been great by itself, but the 3d part made it so much better.