Just one final comment Ondrej for your reference and information:
Below are two snapshots of the texturing results using an identical image set, processed
(1) with mosaicing unwrap method and texturing style enabled and
(2) with classic geometry-unwrapping and visibility-based texturing style. While the mosaicing shows better sharpness/crispness in most areas…it creates some weird blurred out patches, in particular on high-frequency details too…so I am pretty adamant at this point in time it has nothing to do with the focus-quality of the projecting source image…and more work is needed on the mosaicing feature…which in my opinion is nonetheless a very promising one!