Land Scape unwanted deformation

Hi everyone I have a landscape problem,The images will explain
This what I made in my game

And when I hit play my map deform on it’s alone, and give me this

And when I launch the game it works fine

Hello abdelilah,

From what you describe you have a landscape that is fine when launching but when you play it deforms. There are a few possibilities.

I have a couple of questions for you to help narrow down this issue.

1.) Do you have any LOD’s on your terrain?
2.) In the Viewport under the lit tab do you have any visualizers enabled or is it set to auto?

Please let me know the answer to these and I will continue to investigate at that time.

Thank you,