homemade net/impact screen

ive searched and searched obviously i cant word it the right way, but anyways im setting up optishot in my garage i was wondering what kind of screens and nets you guys have made out of some around the house kind of products.. for instance i read somewhere on here how a guy made and impact screen out of a white sheet and moving blanket. cant find the post now tho lol. but not i dont have a projector yet but will be getting one within a month or two so im thinking i would like to go with a impact screen with some around the house things like a sheet. my interest is how you attatched it to the ceiling and how far from your swinging area and what materials.
thanks for your time gents.. have a great day.