Increase the max render distance. Note that too high will cause too much to be rendered and that can lag the game up a bit. For example, maxing out my max render distance doesn't seem to impact performance at first, but once I tilt the camera, the frame rate drops massively due to all the extra stuff it has to render, so experiment for a good value.
<rant>The area outside of the max render distance should be cut off smoother.</rant>
