Import from Blender issue

Hi,

I’m new to Blender and i get a kinda weird issue with importing my 3D models to Unity, i searched for several hours but found nothing concrete about it.

Here is my model in Blender : Actualité photo/high-tech/lifestyle - HostingPics.net

And here is the same model in Unity : Actualité photo/high-tech/lifestyle - HostingPics.net

It looks like when I import my model in Unity, the backface culling get toggled (I don’t know if this is possible) whereas it is not in Blender.

I tried exporting every part of my model separately but i always get this transparency ish when i combine everything with Unity.

Idea anyone ?

enable backface culling in blender, should see same results?
(most of unity default shaders have backface culling enabled)
so need to flip normals/faces in blender or make them as 2 sided with solidify…

Thanks a lot ! I thought we could build 1 sided models, problem solved.