First of All it is Hard but you can use blender for the 3d Modell and you must know jbeam. Just search blender on Youtube. If you made a 3d modell you need to implement it into beamng. You need Jbeam for this. I can recommend you the beamng docs and the modding for dummies discord. https://discord.gg/hS9uzcYb But i am recommanding you to Start with making parts for Cars, because ist easier than an entire car, i also started with this like many other poeple. I can reccommend you this Youtube Video Also this Channel makes good tutorials https://youtube.com/playlist?list=PLUjOUeYozMDwAHpXFsATOhKeGbc-SV273 . I hope that helped you. --- Post updated --- Its not easy to make beamng Mods.
@Snowmaster hey I have a question because i'm working on my own project. How did you put the propeller on the rear of the ship and how do i make it spin?
My Friend @PommesPanzer made the 3d Modell so i dont know and i dont know how to make it spinning too. Sry but i think you could Look it up in the documentation or on the forum.
@PommesPanzer Pardon me for advise. How did you attatch to the propeller to the back of the boat and how do i make my own propeller spin?
You need to think of size, is it going to fit in non-mod maps like WCUSA, is it maneuverable, how big is the file and will people download it because of other factors.
It doesn't necessarily need to fit WCUSA, Italy has enough space to fit a cargo ship of any size. You can also always download one of the bigger maps such as American roads or River Highway, which has more than enough ocean to fit even the biggest cargo ships.
Nop i have no plans for it currently because i dont have time and this mod would need much. Practily its cancelled but my friend didnt update it yet.
Even tho its cancelled theres a paid ship mod that is a large ship that i think this was supposed to be https://www.beamng.com/threads/mpv80-multi-purpose-vessel-paid.90597/
If it's cancelled, he maybe could post the 3d model link and someone might continue working on it(sorry for the bump)