Reading Response Transparency

I thought Ellen Lupton's views on Transparency and Layers were an interesting outlook.  It never occurred to me that Layers were an occurrence in everyday space, music, and time.  It's hard to imagine anything as transparent as air could possibly have any opacity.  Makes me wonder what the world would look like with less opaque air....  That aside, I agree that transparency and layers are both extremely important design processes/tools, both of which I've had only minor experiences in.  I'm excited to explore the possibilities of the two.