Hi Marc,
how do you get around the inability to use normal 3D space viewing ? the inability to even zoom in on the model to place a reference point ?
I have also used just 6 points, didnt seem to make a difference, initially it semi matched my model to a photo, but then adding more detail I had the model going really twisted when it had better reference points to match to, especially in the area I needed it to be accurate on.
When I get 5 mins I shall try yet again, I just hate the fact that any slight pan or zoom and its game over.
Placing points where I need them , i then have to try and position the model so I can see the photo as one cannot even move the model to get to the photo !
Steve