For my last project in the class, I modeled a couple of objects (a sci-fi, looking orb and a spaceship) and composited them into a short scene that I shot. While the orb doesn't look too realistic, I was aiming to track the object in the scene and give the illusion as if it is actually in the space. I adjusted lighting to match that of the sunlight on the day we shot this, and made the glow from the orb interact with the scene. The spaceships turned out really good, and I'm happy with how they look against the sky.
Spaceship Model in Maya
Spaceship Wireframe
Orb Model
Orb Wireframe