Now I have not enough material to seriously consider making a lego movie with scenery, lighting, camera quality, but I think I will do it one day. Meanwhile I use Blender, which is a 3d free software that allows me to accurately reproduce the real minifig motion, without adding joints as you can see in any videos. This way I can start to learn lego filmmaking without spending money, it's my first goal. I think I'll do three or four movies more this way, and after that ... maybe I will buy material in order to start real stop motion learning.