Hatchway designs for my Zone Mortalis Caverns

So I needed to design some simple cardboard hatchways to use on my new Zone Mortalis board. Using paint, I sketched up a basic design, such as the one above.

I found some textures of metal on Google, and experimented with a couple different combinations.

Now I have a variety of hatch types, and I will start slotting them into the board. I have a system planned where I recycle old sprue to make the slots, glueing them directly into the board. I will post another update once I have a working hatchway to show you! Next, I'll have to make some destroyed or burnt out versions of these hatches for destroyed ones!