Step 1: Get Your S#%T Together
Step 2: Get Creative
Check out the image so simple it leaves room to make just about anything you could possible imagine, and that's the point. I love foam!
Step 3: Bunker Building
I wanted a Tank depot so measure the size of the tank that will be repaired, you will see I added a door later, so i could get "Dreadnaughts in the hanger as well. measuring all the characters and vehicles that will be using the facility is important if you want to at least make it seem like your miniatures could use the building to repair the Armour the enemy just blew apart.
Starting with a square base large enough to accomidate the vehicles we will now start to build the basic structure, this is a bunker and must look structurally sound so I am going to basically build a 3 walled box out of the foam core and build the doors separately.
Step 4: Bunker Top Floor
after the 4 (or 8) sides and roof are cut you have a few options, where do you want your windows, do you want the walls to appear blasted apart and where your characters guns are located so it looks like they could actually reach and fire out the windows. This is also the time where you will want to add small scratches and small bullet holes with your knife, poke the end of the knife into the paper of the foam core and turn, that's it you have a scale bullet hole. hold the blade flat on and gently cut into the paper and flick, now you have some gashes, if you are using SM and want to make cannon holes use a cigarette amber, place it close to the SM and it will slowly melt the SM into a nice cannon hole, make it look messy by flicking your knife around the hole!
Step 5: Building the Bunker
using a heavy book glue all 3 sides together and onto the cardboard base, carefully place the book on top so everything is pressed together tightly, you may want to do this on a flat surface not the carpet like I did just to ensure everything gets glued nicely.
once the glue has dried or before if you prefer a uniform colour, use a water based (not oil it will eat the foam) base primer this can be aquired at your local hobby store! while the glue is drying we will cut doors and the second story of the project, you will notice I glued 2 pieces of SM (polystyrene 2" construction insulation) together to add some height to the bunker.
Step 6: Doors
The main door will need to be big enough to fit my tank, I also need a door for my troops to enter because opening a giant blast door during an invasion or a cold winter day is not the greatest idea. Start by building the bunkers 4 sides and deciding how big the door needs to be, on this ground floor my doors are gonig to appear closed if you want them to look open just dont add the backing and glue the doors open.
These space age doors are split slider doors like Star Trek and slide raised doors for the big bay! cut 2 identical pieces of cardboard to fit around the door hole, one will be for the backing the other creatively cut a split for the door opening and glue the 2 split pieces to the backing with a slight gap between them
The bay door is largenough to accomidate my tank and will have the same style door on it, but because it is a much taller door it will need more pieces, these pieces need to look like they will slide together, just cut a bunch of rectangles long enough to cross the door and one with a cool shape in it for the bottom and glue them all together onto a piece of backing.
Finally glue the doors in the respective places
Step 7: Finishing the Bunker!
Building columns and pillars is fun and easy and once they are painted they can look like steel or stone or anything, this is the joy of working with SM, I made a few outer support pillars on my project to make it look more rustic, using the scraps I carved stones out to make secure entry points on the front of the facility. To do this simply use a ruler to cut some nice straight rectangles and then slice them on irregular angles add some bullet, and cannon holes also slashes need to be added to these to make them look beat up or well used, once you have added all the little details you want like this finish by painting the entire project with the black primer paint and read my other Instructable to add grass. stones, trees and paint everything to look like rocks or steel!!
Good luck with your project I will be adding a few more detailed stone making projects and such but I will need suggestions!!