How to remove black lines from terrain?

I’m guessing you have to rebuild your light. Have you tried that?

I spawned a terrain and added a material. Some worked ok, but others had black grid lines. How would I get rid of them?

Just tried it- Thanks!

Sorry ummm I rebuild light then it take 2 secs and nothing happen another solution?

Worked for me as well, thanks!

I know this is years late but In the editor click show and then click the grid box.