Help with a landscape

hello all. i was trying to start a custom landscape. it equates to 100 by 100 kilometers. i created it and when its imported i get spaces like a grid over the whole thing. any idea whats going on and how to fix it?

no its like a gap. i can see right through. oddly enough they seem to flash when i move the camera

What do you mean spaces, like black spaces? You need to rebuild the lightning if it’s black spaces.

does anyone know?