160 megapixel panorama from 36 stereo views.  Stitched automatically except for masking the tripod. One of a pair testing the adjustable stereo constraint feature of PT3Dv1 version 1.3.1, which tunes the tradeoff between rigid stereo registration and warp-to-fit via PTGui's viewpoint correction.  This one has a weak stereo constraint,  so PTGui was able to align the 6 images in the nadir area pretty well.  This does not seem to have changed the stereo registration noticeably.