Have you tried joining the meshes in Blender first and then exporting to .b3d?
Select a mesh, shift-select a second mesh and then Ctrl-J to join. You will be limited to 16 materials to one complete object.
Also the .b3d exporter will maintain the locations of a mesh within Blender in that the offset from 0,0,0 in Blender will be maintained when imported to B3D (i.e the centre 0,0,0 in Blender will be the centre 0,0,0 in Blitz even if thew object is offset from that point in Blender).
So you could lay out your world in Blender and then export and on import the offset will be maintained as the object centres will be at 0,0,0 even if the object is offset from there.
Or use a world editor like T.Ed or Giles etc which allows you to import and parse entire scenes.
Select a mesh, shift-select a second mesh and then Ctrl-J to join. You will be limited to 16 materials to one complete object.
Also the .b3d exporter will maintain the locations of a mesh within Blender in that the offset from 0,0,0 in Blender will be maintained when imported to B3D (i.e the centre 0,0,0 in Blender will be the centre 0,0,0 in Blitz even if thew object is offset from that point in Blender).
So you could lay out your world in Blender and then export and on import the offset will be maintained as the object centres will be at 0,0,0 even if the object is offset from there.
Or use a world editor like T.Ed or Giles etc which allows you to import and parse entire scenes.