The spaceship and crane are 3D models I created from scratch. I modeled the spaceship in Hexagon 2.5 and further detailed & textured in 3Coat 4.8.

The crane I modeled in Moi3D. It was also detailed & textured in 3DCoat.

Here is the base 3DCoat render of the spaceship



And the 3DCoat render of the crane which was composited into the spaceship render.



All other elements (buildings, figure, birds) were painted in.