MX Simulator

How come when I run 128 x 128 terrain does not fully render terrain it appears as a smooth terrain until I approach it.

You can see right below me in the screenshot the terrain is rendered and then in the turn and on the rhythm it is a smooth terrain surface.

Specs
ryzen 7 2700x
rtx 3080

<blockquote class="imgur-embed-pub" lang="en" data-id="a/vpJMttL" ><a href="//imgur.com/a/vpJMttL">MXSIM</a></blockquote><script async src="//s.imgur.com/min/embed.js" charset="utf-8"></script>

Mipmaps does that. But, I typically use mipmaps along with anisotropic filtering (nvidia control panel) for it to look good.