So i have this mesh that i made in blender its like a mountain and i have a problem with it. You can see in the pictures when you are inside the mesh its okey but when you are outside you can see thru the walls how can i fix it? https://imgur.com/a/v2vQcvX
duplicate the mesh and rotate it 90 degrees and make that a union if that doesn't work then turn it reflectance to 100