Height spacers

So I am out of plaster for a while...food is a priority over gaming stuff!!  However I found a rogue piece of foam, and decided to cut it into 3x6, 6x6 and larger "spacers" for height that I could them set regular tiles on for modular dungeons....Here are a few shots so you can see what I mean.

here they are en' pile...painted hastily just to add some color, and shellacked to protect a bit...

 here they are stacked up and dressed up.

without the dragon so you can see better....I just thought it would look cool with a big bad monster in there.