questions answered on opera making

Costume room at the opera.  What do they really do back there?  Where do they get ideas for say instance the opera Hansel and Gretel children's costumes?  How are they organized and fitted?  What about the set itself?  How do they paint a back drop the size of the orpheum stage?  Here are some questions I attempt answering.

how do the paint a backdrop to the stage

theypaint the scenery or canvas on the floor.  ginger rogers and fred astaire for the circus at around 1920 when both dancers were dancing and the opera added this specific backdrop for Hansel and Gretel opera. sorry small clip but u can get the gist that this is a rehearsal for the opera, and those are the podiums and risers they stand on.