Depth - AT&T's semi-transparent globe

Logo found in Ron van der Vlugt's Logo Life: Life Histories of 100 Famous Logos, copyright 2012, BIS Publishers, Amsterdam. The small version in the book did not render well as scanned, so this is an identical online version, from http://1000logos.net/att-logo/  

I almost used this logo in the post on symmetry a few weeks ago, but the 2005 version of AT&T's semi-transparent globe symbol fits today's topic (depth) just as well. There's a layering effect at work here, with the darker blue curves in the background giving the illusion of depth as we look through the lighter transparent blue curves on the front of the globe. The light gray shadows at the edges of the globe also tell us this is a 2-D representation of something that's three-dimensional.


                                                                                                                        

BONUS CONTENT - the following image may not be in one of our curated library volumes, so view at your own risk!  Seriously. I will not be held responsible if you look at it and your eyeballs fall out or something.

The British Museum posted this image on Facebook, in observance of the birthday of the artist (Thomas Girtin, born on Feb. 18, 1775).  I think he does a good job of creating depth through use of overlap, size variation, color, location and definition.

BTW, the artist was 18 when he created this.