Hi Sebii.
An OBE is when you are aware that you have left your body, you will see your shell (Body) whilst being conscious of yourself at the same time (Spirit), e.g., you might float around the room whilst your body is lying in bed, another dimension within the dimension we live in everyday life.
Lucid dreaming, seems to be a dimension on its own where everything is clear and you can be in control of your actions, when the dream has ended, you wake up back in reality.
With an OBE, your in reality whilst being aware of things happening in this reality, you don’t really wake up from an OBE because your already conscious or aware of what’s going on around you, it’s when what seems paranormal leaves your reality that things go back to normal.
Astral projection suddenly appears and you become aware that you are somewhere else other than the reality that you know, it’s like you are going along with the journey, but not necessarily in control of where you are going, although those who have mastered astral projection can be in control.