...and in this one, I'll be showing you how I make giant mushrooms, crystal clusters, and stalagmites (using the textures provided, along with bits of cardboard and a few drinking straws).
And, while these pieces might not look as nice (or be as durable) as 'proper' terrain ...when they're all laid out on the tabletop, they don't look too bad (plus they're super quick, cheap, and easy to make ...making them ideal for the busy GM).
So, if you want to have a go at making a few yourself, you can pick up the pdf file over on RPGNow or DriveThruRPG (note that all of these Print & Paste pdfs are pay-what-you-want products - so pick them up for free, or pay as much/little as you like!).