as you see here, there are two cubes, one has a solution to the problem, and one shows the problem.
now in my case, i have a simular problem as the cube to the left. i have a cube, witch has too many verts. i would like to keep it at 4, so i get a 100% quad model.
the cube on the right shows one solution to the problem, however i do really not want to use that method if its posible to avoid.
another thing is that i do NOT want to add too many extra verts to fix the problem.