[sblock=OOC]Looks good to me. Double proficiency is correct assumption as per one of my previous posts. The tunnels vary in width around her from 5 to 15 feet. It almost reminds you of seeing multiple ants nest holes close to each other. Same hive, multiple entrances. Every 30-50ft or so you can see a service shaft that runs directly up to the surface, lighting everything up. In the direction of the compound, you can see the opening to what looks to be the bottom of another large pit. Here and there, little spotlights made of moonlight litter the catacombs.
Stealth is certainly useable in these catacombs. There are general pathways you can take that are only dim light (So lightly obscured), but you can easily sneak most of the way in darkness. You would guess that since a very large amount of creatures have dark-vision, sand goblins would too, so as long as you stuck to the shadows, then at the very least even creatures with dark-vision have see you at disadvantage.[/sblock]