Add new texture zones (Poser)
Use nodes to add bars to the windows (Poser)
Create a cloud dome (Poser)
Make a starry sky (Poser)
Add a moon (Poser)
Change the geometry (Poser)
Make new geometry from the model (Poser)
Change Perspective (Poser)
Add Displacemeny, Ambient and Specular Maps (Photoshop)
Beat up the whole thing (Poser)