Why can't I see landscape at all times moving around in the environment?

I am applying textures to my landscape. I am not sure if this is normal or if it is not normal.

When I am navigating the environment, the terrain can look super dark, or super bright (almost white wash-out effect) happening.

Is this normal, or is there a way to fix it? I have attempted to find something to help me, but I have had no luck on my own. Any help would be greatly appreciated!