I imagined this as some kind of a establishing shot from a pov of a dwarfmine. Since its a dwarfmine i choose to be discrete with the design on the exterior architecture. I also applied the entrance shape to the sides of the mountain if you can notice Rest of the landscape is a mix of mountains and swamps...

Once again is this is a pretty wide matte at 6188px, seems one can cram in alot of details in that ratio since i like it bigger hehe

Hope you like it

cheers