The last fairly subtle changes barely show up at this resolution: the piece is approx. 24″ x 18″, and I have to scan it in four parts. This low resolution image does not show the impact of some of the recent shadings and added color.
Recent changes mean I scan twice, then merge down onto an earlier full scan. Getting it all aligned is a real pain, and I know I am off by a few pixels… and those errors multiply! Very tedious.
You may even note the small changes (especially to upper left curved “twig”) in this photograph taken after framing (too lazy to take out and rescan now!) As you can see, the lighting & color are rather different in the photo (vs. the scanned image at top).