My terrain looks bad far away or the tops of the mountains clip off.

Here is the screenshot.



Obviously its a system designed to help performance. How can I turn some of these settings off? I have a very simple game, despite the terrain being very large. Id like a little bit more control over what is de-rendered based on distance. What are my options here?

 

So, it seems this is a distant top down shot of your terrain, could this just be your camera draw distance? if so go into your camera and increase the far clipping planes.