I have been willing to post this for some time, but no time. And since it takes no time, what better time than now . Anyhoo.. it's a Blender addon, which honestly don't understand why it is not included by default.. . What is does is that is makes the process of creating terrain mesh (starting from the main road) extremely easy. It is of course useful in other situations, but no need to describe more here. Example: You can read more and find the source code here: https://wiki.blender.org/index.php/Extensions:2.6/Py/Scripts/Modeling/offset_edges You can find the compiled script (mesh_offset_edges.py) here: https://developer.blender.org/F100890 INSTALLATION (as for other Blender addons): Put the file in your ..\Blender\2.xx\scripts\addons directory. Then, in Blender, bring up User Preferences and click on the Addons tab. At the bottom, click on "Install from file". Find the file and open it. Don't forget to save user preferences. Have fun.