Watertight geometry

[hunter_williams]

Does is matter if the mesh of my ship is watertight or not (all vertices are welded together)?

[georgi.zhekov]

Yes, geometry should be watertight. There should be no overlapping faces, no open edges, etc.

If you use single face geometry like a simple plane for example - make sure to shell it first so that it has some thickness, otherwise the simulation might produce unexpected behavior.

[hunter_williams]

So you are saying that in addition to it being watertight, the mesh hull should also have some thickness to it?

[georgi.zhekov]

Depends on how it looks - if it is a closed volume it should be good. If it is just a bent plane (single face geometry) it will need some thickness.

[hunter_williams]

So this example is just a Maya cube that I have made into a boat shape and is watertight. So I would not have to add thickness to it?

[georgi.zhekov]

This one is great, no need to do anything to it.