Concept -
When the human people finish their work and leave their offices, this isomorphic special characters rise from the 2D paper world to live in 3D life world and they try to build their own world and generating new people. I inspired with my childhood when I was in the school I was cutting paper with character shapes.
References -
I searched a lot for reference images on the web and there are many good sites for this, the best one I have ever seen in www.flickr.com really this have excellent source for millions of images.
Modeling -
Modeling is not the special thing and complicated in this project, it is a simple polygonal geometry here is some wires.
Characters and Poses
The most special thing in modeling is characters; I modeled it without any reference and just draw some polygons and moving some vertices. About the poses it was taken by attaching Biped to every character.
Modeling Tips
When you intend to model anything then try to collect a lot of images of it to reach the perfect level in similarity
If you don’t have the references or blueprints of any object, try to draw it by yourself with splines or any drawing software like Autocad or any other one.
Make your models with low polygons as you can to conserve the memory, so you can also navigate the scene easily and avoid/reduce the lockups or crashes.
Try to learn different skills such as rigging, particles, scripting… and others that will help you in modeling process.