Ok after a long time I finally have a playable demo I can share with everyone via the web. Just go to
http://apoidgames.web44.net/wedge.html
The controls are basic and it may run a little slow as I only have one type of the two types of triblock showing. There is also no collision detection so you can walk right through all of the blocks. I built it using three.js, and I'm hoping to get to the point where it can be edited. It at the very least will give everyone an idea of what I am going for in the landscape. Just imagine lots of these triangles put together into one large field. Anyway I'm back to figuring out how to make this even more interactive.