MPowers
Well-Known Member
First, the classic "Cyclorama" often reffered to in my youth as a"Sourround Cyc" was usually tall enough, often 30' or 40' tall not to need any borders or teasers to mask the top. It was also hung on a looooong pipe bent into a half circle, starting on one side, close to the back of the proscenium, and going up stage, curving across the back and then down the other side until it was again past sight lines. So your old school cyc lights were very high and fairly far down stage but you got an incredibly even wash due to the distance. The stage could look like nothing but endless sky (or other colored background) beyond the proscenium opening with absolutely no black masking anywhere.
Of course entrances were limited to DL and DR unless there was a trap from below or flown in from the light bridge. Or if free standing scenery in front of the cyc did the masking. This typ of cyc was quite expensive, and real exercise to rig with as many as 20 or more lift lines from the arbor(s) or winch drums, miles of GAC and a ton of mule blocks and idler pulleys. This description might clear up some of the photos you may have seen in history books of Appia, Belasco et.al. and some of their scenic/lighting designs from the early 20th century that appear to have miles of landscape behind the scenic units to the "sky".
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