Hello, Cartographers! I'm a long-time lurker with a question for which I desperately need help! I've been blown away by the things I see on this site, so I'm sure there are good ideas to be had and shared.

Some of you familiar with Planescape or earlier editions of D&D may know about how Yggdrasil has existed in that game. Basically, it's a mythic tree so huge that it crosses into other planes. By climbing it and walking its branches, you can uncover portals into other locations in the multiverse.

Are there any mapping resources (textures, etc) or techniques that you could recommend to render things like tree branches so huge that small villages are nestled into them and groves of more mundane vegetation can spring up on them? I want to generate battle maps for MapTool encounters set among its boughs.