import problem

when i export my blender project and import to unity they can be seen through .how can i solve this problem?

 

Some of your normals are probably facing the wrong way.

In Blender, select everything in Edit Mode, and hit shift+n to recalculate normals.

 

nothing has changed unfortunality

 

Enable backface culling in Blender. Does it have the same issue in Blender once you do that?

 

ı realized when ı hit blackface culling hiding some minus angle ı think. is it?

 

should ı change that verticles or blackface is enough?

 

backface, not black.