Control+Alt STudio's alpha viewer is the only viewer i know of currently that has Rift support, i am amazed that he got it working in a short amount of time. A big let down to Linden Lab (once again) for promising to deliver on Rift support "by the end of the summer"last year and failing to deliver. I think maybe they are going to wait for the consumer version which is fine. The control + alt stuidio version works pretty good.