Bunker - my first object

Bunkers are build in World War II they are still there by the railroad. There are many bunkers in Croatia. My object does not have shadow. I have already asked Adam what defines shadow of the object, and he told me that they are already defined in model before importing in RS. If somebody knows what option is for the shadow in 3d max. I would be grateful if you could answer me on this post: http://www.railsimulator.com/en/node/3154