Landscape map changed

Hey! First time trying to use unreal so sorry if this is basic. I made textures for my landscape, but when I took them off my landscape looks grey black and foggy instead of what it looked like before- earth/ sepia toned and checkerboard.
1: does this matter/ effect function?
2: even if it doesn’t matter how do I bring it back to how it used to look?
3: also included pics of both stages, idk if the formatting will b weird of not cuz I did this on my phone