This tool is now available on the Unity Asset Store! http://goo.gl/JTXPkY
This is a preview of a tool that I'm working on for Unity3D. It generates 2D terrain using a quickly defined path, and a terrain material!
It can easily expedite level creation, especially for large levels, or compared to hand-drawing everything. Ease of editing also allows for rapid iterations, so you can make better levels faster!
We're talking about it on the unity forums here:
http://forum.unity3d.com/threads/1979...
And you can always chat me up on Twitter @koujaku =D