Submarine Not Watertight

[Roxy]

It would also help to post the .STL file. But what is happening to you is similar to what happens to me if I don't pick enough solid top layers. It kind of looks like what happens when you have very sparse (10%???) infill and then try to put a top layer on it. It takes a few layers before you have enough to build on to get a polished top layer. I'm overly conservative on that, but I usually have 10 solid top layers just to make sure I don't get to the end of the print and have it fail because the printer can't quite bridge the gaps and close up the infill.

[torpedochief]

Thank Roxy! How do I set that up on Simplify 3D?