I've heard of this story, but never seen an actual photo. It's in the Star Trek 365 book. I like him without hair. Glad they went with balding.
That is infact a photo taken during season 5, Violations. http://en.memory-alpha.org/wiki/Violations_(episode) Picard with hair is seen during a Bev Crusher flashback 'mind rape' sequence.
There are likely no photos of the test before the show started. As I recall, they had a special wig done, the makeup artist put it on and then rushed them over the Gene who immediately shot it down,
I like how in that episode it's supposed to be a flashback yet Beverley looks 100 years old with that silly hair.
The Shatner Turbo Two Thousand. I've seen movies like Dune, Lifeforce and Excalibur, but I can't remember what Stewart's natural hair color is, anyone know?