[magatsu1]

Let's say I wanna join a wing (or similar) to the main body of a ship. Using Booleans or glue does the job but doesn't really look very tidy. If I model with "meatballs" Truespace asks if I want to make a "polyhedron" which, when confirmed, creates a single object which looks the part and has gotta be more stable, but is mega poly heavy.

So, can i join non-meatball primitives into a polyhedron then ?

[TrashMan]

Use booleans. Just be carefull. Don't use the triangulate option unless the model is very detailed or triangulatted allready.DON'T use that option if you want to add more stuff to it one by one!
Use add vertex to manually add the lines so that faces will be convex.

[Beowulf]

Biggest tip I can give...

Take your time to edit per vertex. Weld as many as you can and delete as many as you can. Promptly use the create edge tool to break up odd-shaped polygons.

[magatsu1]

I thought it was "poly draw" to break up odd polys ?

[karajorma]

Both will work.