Maybe i know what do you mean now
Here's the new link :
https://www.sendspace.com/file/q29uqf
The pack include parts in red box for shadow problem and "red and black" hull, if you want to try to work on angled faces problem
From pics, i can see ship's stern was a little different nearby sea level, really narrow at extreme end of hull:
Best regards,
Vd
When solved, next step will be rework the bow.