While Skyscraper has a good compliment of blur where it counts, there’s scenes where the blur isn’t as well defined.
This leaves some scenes looking practically 2D without the glasses on, which could explain some of the presentation’s shortcomings.
While it may seem like a cool side effect of 3D filmmaking, the blur can actually dictate just how well the picture is manipulated to create a three dimensional picture.
Taking off your glasses during a 3D presentation does two things: it gives you a chance to rest your eyes, should you need it, and it lets you see how blurry the picture is.