Which blb exporter are you using? Badspot's converter is limited to only 500 quads maximum.
Also, it seems to me that only those faces are missing which have more than 4 vertices. Try converting those faces into quads instead.
You can't use ngons. Each face must have either 4 or 3 corner vertices.
how do you convert n-gons into quads?
So each face can only have a maximum of 4 vertices? Thats disappointing.
That's how practically every single game engine ever works. I've never read about a game engine that supports ngons but I'm sure some do. You should never rely on them for gaming purposes. 3D rendering is a whole another thing though.Quads (4 verts) is a similar thing. Engines can only render triangles but there are a few engines that support quads.
Blockland supports quads, right?