Cool dungeon tiles.
Wyloch's Armory and Black Magic Craft are good sources for tutorials. I wasn't aware of the Dungeon Craft channel, now I'm subscribed
I found another dungeon tile tutorial on The Terrain Engineer's channel, it's cheap, quick, and easy to make lots of tiles in about one hour-Inexpensive, No-painting Required Dungeon Tiles
Make 60 4x4 or 240 2x2 in about an hour