Good evening:
I´d followed the directions of the "bad cop" (thanks, Eswube!) which were easy to follow too. I also tried to understand the sun influence (with an old model, unfortunatelly one with rounded surfaces, not the slab sided of a modern vessel and a flashlight). Both, with the sun coming from de bow, and coming from the beam looks fine!
Here is the 4bis attempt!
Cheers!