I've always used some sheer fabric. This year I upgraded to a rear projector screen for $30 from Amazon and it was a big improvement (Mdbebbron 120 inch Projection Screen 16:9 HD https://www.amazon.com/dp/B07FB6VW1M/).

Also upgraded to an LED projector from wish.com ($58). 1200 lumens, 1080p HDMI which I plugged my Roku stick into and accessed Plex media server wirelessly to stream Michael Jackson's Thriller which I made into a loop 2.5 hours long. Projector surprisingly good in the dark. As good as the $1200 lamp projector, circa 2006 it replaced. https://www.wish.com/m/c/5a532053e26cae51de4a48c2

Needed to tie the bottom down as this new screen was shorter than the fabric of prior years. So I melted and molded a milk jug over my $20 skull. Took it off and filled the mold with concrete x3 (https://www.amazon.com/photos/share/S5GsIXpe1bW0qiCBSqgZmyrnEthtb76lP29UVZe2CwS )

I like to add something new every year 😁