360deg tracking in small space with 2 cameras?

Hi,
I would really like to know if it is possible to track 360 degrees with only 2 cameras in a small play area. Also, will the rift be possible to be utillized in roomscale in a space of about 1.5mX1.5m?

Also, how is the occlusion with 360 degrees and two camers, and how it is with three?

You should be ok according to the official Rift specs which define that you need a 5'x5' space (1.5mx1.5m) and two cameras on opposite corners.