dllExport, I'm wondering, in the mean time, if you would want secondary photos to be fully opaque, assuming that you are correct about them being darkened as well, or whether you would tolerate them continuing to be approximately 50% translucent. I suppose that I just feel that you are setting yourself up for disappointment if you're expecting seamless panos with today's Photosynth viewer.
Microsoft Research's HD View is currently a much better way of displaying real panoramas online using Seadragon image streaming. As I've said by now, perhaps the Photosynth team is in the midst of integrating the HD View viewer into the Photosynth viewer. I've been hoping that they would for over a year now.
To me, Photosynth's real strength is that it can match photos anywhere in a scene, instead of being trapped on one pinpoint of ground and simply swiveling in place, as panos do. How previous panorama technologies have dared to market themselves as 3D or VR is beyond me.