Yeah, I had to look up "Krenshar" in the D20 SRD - never heard of them, but I'm more of a 2nd Edition and before guy.
I was expecting another 3D map from you, like I'm trying to do!
I like your Pile of Poo!
Since this dungeon has no defined entrance, I'm creating an outhouse hole above on the surface, access to the dungeon is only through this hole. So a light cone shining down from above lighting up the manure pile is going to be my entrance to this place...