Thanks for your suggestions Laime^^

Yes, I haven't applied any effects on the overland map yet as it's not my main priority. If I manage I'll try to make it look somewhat crudely hand drawn, or I might just use it as it is to show the players where they are in the new world.

Yes, I'm not happy with the tiling either. The morgue floor tiling in the dark room I like, but I used it in the entire previous dungeon I did, and this dungeon is carved into the mountain and the stone floor is polished in at least some places if not all. I will look for something more gray though.

The in the white room separates two levels in the room. If I had put in the stairs it'd be clearer, but they're not there yet. You can see it better at WotC's site http://www.wizards.com/default.asp?x=dnd/4map/20060228a http://www.wizards.com/dnd/images/rhod_maps/95696.jpg

In the other room it's supposed to separate three tiers of elevation with about 5ft between.