Based on my "The Discovery" image this model has two side chambers and separate ceiling for those who want to create a scene without the bomb damage. Ceilings, floor rubble, hanging damage and rebar are all separate items that you can remove or use elsewhere.
The main chamber is large enough for two subs side by side. Gantry & motor/wench in main chamber are separate items movable along their rails. Detailed keel block provided for placing over the basic keel structures where your camera is close. Bunker tilted 3 degrees so you can have water through the gates up into the bunker along the center channel.. the floor is not flat. Raise water levels up to the level where a boat would normally sail in... an E Boat would look great!!
This is a large model of 13 main objects broken out into 50 separate textures, 912,500+ polygons and 7 lights including the sun. There are many open light fixtures that you can add point lights to in your own creation. My own texture methodology is to assign proper materials or texture maps and then scale them up or down depending on the lighting and camera angles I am using. I often find that what looks good for one camera angle needs to be altered if I change the POV.
Lighting is what will make your creation unique. I was originally going to provide this as a set of VOB models but felt that it would be useful to just provide it as a scene Vue file to help get you started. In my own work, The Discovery, I made 3 different renders only to combine two for the final result I was looking for. Don't rush, enjoy, learn, keep pushing the envelope. A hint... A simple cube stretched out as a board positioned above other objects and "Smart Dropped" creates wonderful damage dabris.