Align selected cameras

[William Ringle]

Can anyone explain why "align selected cameras" works on (some) photos following an alignment, but these same photos are not aligned in the original alignment pass? In other words, why does alignment initially fail for a given photo, then succeed during "align selected cameras"? Shouldn't the program be "smart" enough to make a second pass during full alignment to see if unaligned photos can be aligned before finishing?

[basilio]

The issue has to do with ordering and computational complexity:

The "second pass" would need to use a different ordering or it would likely end up in a similar position (or maybe place one or two more cameras in your list but not more). If you forced it to do it systematically for each of the images until all are aligned it may end up in an infinite loop.

There could indeed be a "try brute-forcing it" option, but it would not necessarily be a very smart solution either!