weird thing happens with normals or something

well i imported this obj file (and i think that is the problem but i dunno how to solve it) and this weird thing happens in bge.

its like i can see through the mesh at some places.
so if anyone knows the answer …


in edit mode did you try ctrl+n?


or did you try to set all faces… twoside faces?

Edit Mode --> CTRL + FKEY --> Face Mode Set --> Twoside


Do what santijago said, but set them to “opaque” instead.