When creating a mosaic dataset without "build footprints" step, I get empty footprints of overviews. The locations of the images are within red borders. Everything in between are empty footprints.
"Build footprints" step produces stripe holes between the images despite all possible settings combinations. A high number of vertices solves the problem in most of the cases, but for some it has to be so high that the processing never finishes. Therefore, I hope there is another solution, for example somewhere in the "mosaic properties" step.
It is possible to delete all the overview footprints that do not overlap with the border, but it seems like it shouldn't happen in first place. My concerns are performance in the web and general understanding of what is going on.