The shading of builings and ships rotates if you change the horizontal camera angle. This feels unnatural.
Maybe just pick a fixed sun position , which would be changeable with eg. a lighthouse like in ANNO 2070?
I didn't notice if there is a solar cycle, however, there is an option to fix the sun position, it may remove this unnatural feeling.
I go a little further, a night-day cycle could be amazing to see, even as an optional cosmetic feature with a switch on-off option.
