Hellhound, your standards must be pretty high--your "failures" look better than some commercial rpg maps I've seen

But since you asked for commentary, here are my two cents. The mine looks pretty good, but the watch towers should be closer to the bridge. Unless there is some feature thats crumbled away, it looks possible to get around the towers to the bridge (yes, you'd get spotted and hit, but a large enough group could make it past with minimal losses). I guess my idea of how watchtowers on a bridge should be drawn is influenced by the bridge over Skull Gorge in Red Hand of Doom. The towers there provide both lookout perches and block access to both ends of the bridge by providing chokepoints that can be blocked.

The other quibble is the large "patio"/open area on the other side of the bridge. Why is it there? If the mines were as valuable to their ancient builders as your comments indicate (and a source of psi crystals and dorjes would be very valuable indeed to a psionic empire) then the builders would have made the other side enclosed with only one entrance, not the multiple entrances that the map shows (although underground, the builders of the mine would have been wary against fly spells/disciplines and wanted to shield the troops guarding the mine). Although your description states the miners were initially mining the cliff face, if the mine was under external threat (which it may not have been--it sounds like the builders were more worried about miner rebellions) then that area would have been enclosed.

As for the tree fortress--well, the side view is not "arty", but it does get the job done and gives a good idea of how the levels relate to each other. An illustrator you may not be, but your cartography skills more than make up for that (grin).

I guess any criticism I have would be regarding the second tree fortress level. The room layout does not seem optimal and is a bit confusing. And, unless it would compromise the structural integrity of the elven fortress, why were no rooms built into the trunk on that level? (Yes, I know you were creating it on the fly for the eldest Gelfling (I hope there's not an eldest Skeksis , but you might want to try circling the rooms around the trunk in the future and using the interior of the trunk.) Another good reference for future tree fortresses is the Drow tree fortress from the adventure in Dragon Issue 73--its multilevel as well and quite skillfully done.