Ralph McQuarry has died. Probably the greatest concept artist ever, and more responsible for the look and feel of the original Star Wars trilogy (also known as "the Star Wars Trilogy") than anyone else.
When you really look at those films, every image that sticks with you came from McQuarrie's imagination. Darth Vader. Cloud City. AT-ATs. X-Wings, the Millennium Falcon. The look that he came up with was thorough, consistent, and wonderful.
I have a signed lithograph of his rendition of Cloud City at dusk, it hangs in my son's bedroom, and it's a treasure.