Originally Posted by BlackShark
I think you're going the wrong way.
RealD 3D is circular polarised : it is extra-sensitive to the quality of your silverscreen. Take any cheap silverscreen and you'll get significant amounts of ghosting. If you want good results, you will have to get the highest quality screen you can find (Stewart or Harkness specialised 3D silverscreens, not the lower quality "compatible" ones), but even they you won't match the ghosting of linear (unless you tilt your head of course, in which case linear looses all it's interest).
I haven't tested both myself, but from the ghosting test pictures I've seen, the difference is definitely noticeable.
Linear polarisation slightly less sensitive to the quality of the silverscreen, I mean the results won't be really good with cheap silverscreens but they'll be usable. You can buy online 45/135° or 0/90° linear glasses in similar style to realD3D glasses for cheap.
Screens : silverscreens are very fragile, they aren't made for outdoors, you"ll destroy your screen if you leave it outside : so you'll have to move your screen in and out every time you want to use it.
Mounting and unmounting a screen is a pain, especially since the screen surface is so fragile and doesn't tolerate folding or wrinkles.
Rolling is the only way to store a silverscreen (rolling with a large radius), but I suspect re-rolling the screen multiple times damages it since screen manufacturers advise not to re-roll the screen after it's been attached (and dried) on the frame.
You'll probably want to carry the screen on it's frame... and run the risk to scratch it against some furniture by accident, which I did many times on mine, small scratches in the corners lucky me, but a bad scratch in the wrong place, and I can kiss my screen goodbye.
There is a very good reason why the Omega filters are so attractive, getting rid of the silverscreen is a real advantage, even if you're a high gain screen fan.
If you're still interested in polarisation (for the light boost), I seriously recommend you leave the screen indoors.
As far as the different types of filters, I am not familiar with the polarisation "twister" type of filter (rotating 45° or 90° one way or the other way). But I know other people have made it to get as much light as possible from these types of projectors with all 3 components polarised identically.