I went along and added rivets (252) and a few resin detail parts (Pardulon and DragonForge) 
And with Paint. Base was textured with a mix of Vallejo Oxide Paste and Black Lava. 
You may all remember a few years back when I had an old piece of GW terrain, laser cut. If you don't, go take a look, here So, fast forward to today, and with the aid of a die cutter, and some thin card, we have the following. Necromunda Tunnel Entrance. Just the raw card, assembled with the GW bulkhead. 
I went along and added rivets (252) and a few resin detail parts (Pardulon and DragonForge) 
And with Paint. Base was textured with a mix of Vallejo Oxide Paste and Black Lava. 
I went along and added rivets (252) and a few resin detail parts (Pardulon and DragonForge) And with Paint. Base was textured with a mix of Vallejo Oxide Paste and Black Lava.