A year or two ago I create this OVNI(UFO) for use on a scene for learn about voodoo camera traking and the integration of objetcs on a video with blender. See the scene here (internal render):
http://www.lluisgarcia.es/blender-voodoo-composition/
And I create the scene on the picture to practice the skills learned here for the creation of materials in cycles and some composition
If you like this model you can download from Blend Swap with materials etc.. ;)
http://www.blendswap.com/blends/vehicles/ovni-gt/
