How does one efficiently figure out which photo resulted in areas of the sparse point cloud after the photos are aligned? In some cases, I can see photos that very poorly matched and created obvious anomalies. I'd like to delete those photographs. However, when the number of photos is large, this is not an easy task. Any tips for doing this? Otherwise, one has to keep deleting until the point cloud changes (right?). It would be great to be able to click on a point on the point cloud and have the photo(s) from which it was derived turn a color.