All the paintings were behind glass, which is in general not my favorite way to look at work, but can be important for conservation and safety. Unfortunately, Bacon's work, with is subtle darks, really suffered from this. In general, I'd much rather have to stand back a foot or two and actually be able to see the work I'm looking at than be able to get really close, but be blinded by glare, but this issue was particularly problematic at the Bacon show.
I'm certainly not trying to suggest we throw all caution to the wind at major museums, and put great works of art in danger of being damaged. I'm not sure exactly why these paintings were all behind glass, and do realize there could be a very good reason for it. Unfortunately, it made an otherwise amazing show difficult to view. Also, it was really hot and smelled like sweaty New Yorkers in the first few galleries, but that's another issue all together.