Read a book about the making of OZ. The whole thing was one strange, weirdo happening after another. The one I like the best ( although I don't know exactly why), is that Judy Garland was sporting a big healthy rack, so they taped those bad girls down every day. Couldn't have a big boobed Dorothy in 1939...no way.
I know somebody who worked on the 80th anniversary remaster which is being released sometime this year. They took the original negatives (or an early print), cleaned them physically and digitally, and scanned them in 8k resolution (released in 4k though). The picture is unreal. You can see real burlap on Ray Bolger's face, for instance. But my goodness... every imperfection on Judy is on display. Taped boobs and caked in 3 inches of makeup.
A little known fact is that the person who taped Judy's sweater meats down every day was a young Harvey Weinstein. Got him hooked. Nah. Made you think though.