For some time I've experimented with creating terrain for use in 3D immersive spaces. Usually I am trying to alter DEM files to create simulations of project sites. But lately I've started to explore creating specific shapes or designs, and I think I've finally found a work flow that might make the whole process a little easier. Here is a file I created that can be used in a world like Second Life or OpenSim. If you have estate powers, you can go to the estate menu and upload the file as a RAW file to create this land. It is a square measuring 256 x 256 meters with 4 star-shaped hills rising out of star-shaped water features.
If you click this file name, you can download the file for your own use. I am releasing it under a Creative Commons license that would allow you to basically use it for anything except selling it as is. Since this is my first time offering a file I created, please let me know if it does not work for you.