To put the aliens in pose, I created a really simple rig, which gave me the possibility to easy experiment different poses.
Illumination
The illumination has been one of the most hard though amusing part of the project. In the scene we have different light sources: the red neon sign on the left, the neon of the shelter, the circular sign on the right, and the lights of the truck. Before reaching the desired result I did a large number of attempts. A key aspect when setting up a night illumination is taking care of the light falloff. Generally speaking, I followed this principle.
In the first phase I fixed the main lights for these objects:
Later I added some fill lights and rim lights:
I simulated the neon lights cloning omni lights along splines: