Octo
Insider
So far we haven't seen anything from the underworld..what's your personal vision for how it should look? Would you want natural caves or 'man'-made caverns, or maybe underground fortresses and great kingdoms like Moria? Would you prefer it to be claustrophobic or vast epic open spaces and bottomless trenches?
Not sure how far you can go in a low fantasy setting.
Here's some concepts (not my own work) to get your juices flowing.
http://www.gamersireland.ie/wp-content/uploads/2010/08/Spider-lair.jpg
http://features.cgsociety.org/newgallerycrits/g76/294876/294876_1257800277_large.jpg
http://images2.wikia.nocookie.net/__cb20080714044933/godofwar/images/8/80/Typhon's_Cavern.jpg
http://0.static.wix.com/media/3ee375_f906a3bfa88308e8e112fd8a72b3cc9e.jpg
http://www.robinolausson.com/main.php?g2_view=core.DownloadItem&g2_itemId=113&g2_serialNumber=2
Not sure how far you can go in a low fantasy setting.
Here's some concepts (not my own work) to get your juices flowing.
http://www.gamersireland.ie/wp-content/uploads/2010/08/Spider-lair.jpg
http://features.cgsociety.org/newgallerycrits/g76/294876/294876_1257800277_large.jpg
http://images2.wikia.nocookie.net/__cb20080714044933/godofwar/images/8/80/Typhon's_Cavern.jpg
http://0.static.wix.com/media/3ee375_f906a3bfa88308e8e112fd8a72b3cc9e.jpg
http://www.robinolausson.com/main.php?g2_view=core.DownloadItem&g2_itemId=113&g2_serialNumber=2