I've been reskinning for various train simulators the last 10 years, some model makers design to be easy to repaint, others never give it a thought mapping pixels here there hither and yon. These unholy hulls are the same way, I spent the whole day trying to figure out what maps where before I finally got the ballast tanks without making hatches, diving planes, and other assorted kibbles & bits the same texture. End result;
It was scheduled for drydock and repainting Dec 9, 1941, never made it there.