Yeah when i first did mine I went by this site....
http://www.ghostsofhalloween.com/projects/pokadot_wall/ many emails back n forth to him is what got me started. I just went and got black bed sheets from walmart the flat sheets. I have assorted now, twin, double,/full, queen as i use them also to line my garage and use as table cloths etc. Easy to wash, wont fall apart, and can use them year after year. The plastic is ok for those who like plastic as i myself used black plastic years ago. I just dont like the light shinny reflection on the plastic. Then again all my haunt is either in my garage or covered by huge tarps. So some have to use the plastic for weather conditions.
Now if you look how far Adam has gone with his dot room with the 2006 pics of the neon balls now hanging down. Well I just ran my lil self to walmart and i too will have some neon balls hanging down. WOW that sounds kinda kinky LOL...I also got 50 3d glasses this year. Also some plain white mask to try on the walls and then an actor will have several mask on his outfit. LOl this year will be interesting. BUT yes cloth is ...well i personally think a better deal.