I'm not sure if this question needed a new topic so I'm just posting it here.
I've done a lot of reading here about DIY screens and I got a pretty good idea how I'm going to do it.
Except I'm not sure yet for which screen material I should go. I got a bit confused with all the different spandex combinations and blackout screens.. :s
I have an Optoma HD20 for some years now and it has always been shining on my white-ish painted wall with no screen.
So I'm not sure which is the way to go now. I found that the HD20 has a contrast of 4,000:1 which is pretty low I believe.
And 1,700 Lumens which I have no idea of if that is good or not.
Any advice would be appreciated, thanks!