Way back in 1975 George Lucas commissioned the concept designer and illustrator Ralph McQuarrie to illustrate the characters and scenes for an upcoming sci-fi movie he was working on. That movie of course turned out to be the original Star Wars.
Star Wars: Episode V - Two early Ralph McQuarrie sketches for a one-man snowspeeder (with no radar operator in the back). They were a bit too boxy from the front view, so Joe Johnston gave them more wing in the final design.
On January Star Wars concept artist Ralph McQuarrie completed the first painting -- The Droids in the Desert -- to help sell the look of George Lucas' faraway galaxy to studio executives at Twentieth Century Fox.