Probably a really obvious question, but what setting determines the draw detail distance on a landscape? As you can see in this vid when I move back and forward the textures becoming more crisp becomes really really obvious.
Hello there @freezenification!
What you are seeing there is the landscape’s LOD, adjusting how much detail is shown, according to the camera distance.
If you wish to adjust said distance, select your Landscape in the Outliner, and look for the LOD section in the Details panel. From there, you can determine how many LOD levels to use in your Landscape, and how much screen size they cover. Play around with the screen size value, until you get the results you need.
For further parameters to adjust when working with landscapes, please check the UE doc below: