Scene Background Texture

Sorry in advance if this is the wrong section.

I’m gonna be creating a scene for an animation I am putting together, that will have camera movements 360 degrees all around. I’m still new to blender so I don’t know how I would go about creating my own background textures for the scene.

So I wanna create a Highland scene that stretches out to the horizons in all directions. I am only going to be using a small part of this scene though for my animation, which brings me to my question.

Q: Can I make the excess terrain into a Background Texture? If possible, information about how I would do it would be much appreciated.