Originally Posted by Promit
the important point is that it DOES support 4K 3D input, and that's what I needed.
As far as I know, there is no projector on the market that supports both 4K and 3D at the same time.
Hdmi 1.4 doesn't have the bandwidth for 4K 3D even at it's maximum spec (I haven't found any mention of increased bandwidth with hdmi 1.4b, just some standardisation for 4K 2D content).
In order to do 4K 3D, the only capable single connection currently available is DisplayPort 1.2. http://www.amd.com/us/Documents/50279_AMD_FirePro_DisplayPort_1-2_WP.pdf
At present, if you want to do 4K in 3D, the only solution I can think of is a dual-projector setup, with a pair of 4K 2D projectors.
This system can be driven by an AMD Radeon or AMD Firepro graphics card and set your desktop as if your projectors were a side-by-side single large surface using the AMD Eyefinity feature (8Kx2K desktop, with the left half of the desktop being the left eye and the right half being the right eye), and finally set your software to output accordingly as side by side full-resolution. I currently do it with 1080p projectors and it works really well (3840x1080 desktop), I do not know anyone who tested that technique with 4K projectors but the AMD documentation seems to indicate that the current Radeon cards should be able to manage such a large screen surface (up to 16K x 16K) according to their website.
An important note : this might not bother you if you only run your custom software but there are currently no BluRay 3D capable software that supports dual-projectors, you will have to re-encode these movies into a more manageable format (typically a side by side or over/under at custom full resolution) in order to watch BluRay 3D movies.
Dual projectors are passive systems, there are two types of filters/glasses you can use :
-polarised : requires a "silverscreen", modern non-depolarising 3D screens are much better than the horror stories we are told about old silverscreens but they are still high-gain with all the drawbacks they incur, polarised filters are able to save a huge amount of light if the projector output is already polarised (LCD or LCOS).
-narrow band colour (like Dolby3D) : at the moment, Dolby only sells to theatres, Omega optical does sell to consumers via a reseller on ebay : able to use any screen, but the colour accuracy varies greatly depending on the type of lamp used (Xenon lamp >> consumer UHP lamp) and the type of colour filters used to create thecolour primaries inside the projector (DLP multi-segment colour wheel >> LCD 3-way colour splitting), If you use the wrong projector the colour accuracy will be really bad (3LCD with UHP lamp like my projectors)
We talk about these systems right next door at the Ultimate 3D projector thread http://www.avsforum.com/t/1280393/the-ultimate-3d-projection-system-a-practical-discussion-thread
Omega optical also has a thread at the 3D Tech talk sub-forum where an Omega rep answers questions (Motorman45) http://www.avsforum.com/t/1407101/official-omega-3d-passive-projection-system-thread