Post #554548 by Hakalugi on Sat, Sep 18, 2010 12:34 AM

Definitely go the chickenwire route but since this is a one off thing, coat it with mud. Dirt and water will do the trick. Google Pepe Ozan Lingam Tower to see some examples.

Here's one:

Going for a wider base volcano shape should actually be easier than the above project. One thing that's really great about the mud coating is that cracks develop letting out light.