The Party screen
All ways are good except the bad ones. I was at a friend’s birthday party the other night and he had made a simple and funny backprojection solution. The party was held at an office and in one of the smaller rooms they had a big glass window facing the big big main room. On the glass window they had taped two paper table cloths and projected video from within the little room with a normal office projector. The quality was quite okay with exception from the visible line in the middle where the table cloth had been taped together.