but do you need to spend the money on the resolution since people will be close, or on the brightness since the projection will be huge?

if you’re very close, you’ll see pixelation. you might not need HD or 4k, it depends on how far folks are going to be viewing the projection from, think of this like the difference between a HiDPI / Retina Screen and a typical monitor, it’s basically the same.Resolution is decoupled from brightness but they both have an impact on image quality.if you’ve got 3k to spend, you can likely get something much brighter than 3000-3500 lumens. The brighter the better, get as high as you can afford. 3000 (or more) lumens from a reputable manufacture is going to likely be bright enough if it’s in a dark room with the lights off.lumens are measured differently by manufacturer and by light source (lots of low output LED cheapos falsely advertising that they are really bright).

Things to watch out for when buying a projector: super cheap, great image and a good brightness for the cost. The optoma’s are great if you don’t mind a bit of extra bulk.

Control brightness in vdmx