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At Halloween my projection was onto white curtains , thru screen door, thru glass doors that have window tint on them and you could still see the video reasonably well. Sure, it wasn't super defined but what Phantasm is?
One of my visitors had said she'd never bothered to do video projection because she thought her tinted windows would be too dark. She's now changed her mind.
The success of your projection will be dependant on how bright your projector is and how close to "hyper reality" you want.
There's a display near me that does projection onto his large ground floor window. It looks amazing, but (to me and most older children and adults) it's obviously fake. Whereas mine on an upper story balcony and not as bright or defined makes it look a bit more like a real person wandering around in the semi-dark.