Radius of drawing a Normal Map around camera.

Hello, friends. I'm new to Unity, and my question is so basic, but I haven't found any tips in Documentation or settings in Unity.

Okay. I've created a terrain, downloaded some grass texture and used it as texture and as normal map.
After I've put a Basic Character Controller that available in my free version, I've put Point Light inside.
Then I've started game and have noticed that Normal Map is drawn only in a small radius and I clearly see lines on the grass where it ends.
Is there a way to set that radius larger?

 

Try set filter to "Trilinear" and "Aniso level" > 2

 

Thank you, senpai.
The line moved ahead and that's what I wanted to get.