About the mirrors… maybe not totally applicable here (I didn’t look at the pictures in details), but I had very interesting results with mirrors : actually when the space that is “inside the mirror” does not collide with the real space it can help aligment : let’s pretend this is just a window to another room with - what a coïncidence - an identical content. This will be reconstructed by RC, just as if this is a window. I even had interesting results inverting the pictures left-right and aligning them together : RC is tricked, space is reversed and this can help reconstructing parts of objects that are close to the mirror…
Of course, if the mirror is inside the room (and not on a side == wall), this is another story and RC cuts holes in the space trying to resolve 2 incompatible constraints : the real space and the space inside the mirror. And when you have more than one mirror this is even something else.