Continuing from my previous work on this model...Here is a reminder of what I made : 

Updated UFO Model

I created a UV Snapshot by going  Edit UVs > UV Snapshot. 

I then imported this into photoshop to design the UFO. I added a shiny blue texture for the window, a nebula texture for the main ship and a beam of light for the bottom. I also added a Toy Story alien as I felt the design and colours worked well in the movie's universe and it's style. 

Designing in Photoshop

Final texture 

I then applied this in Maya on to a file on a blinn. Here was the result: 

Final design