Please help. Windows are getting closed automatically when i export it to obj.

[VishalMali]

I made a structure in city engine. and i tried to export it as .obj . when i import the exported .obj file, the windows and similar structure are getting automatically closed. also there is a strange pattern appearing. Please help me with this 😭. 

This is the structure i made.

This is what i am getting after exporting it to obj 

Anyone, please help. I am getting frustrated due to this problem.  

[ElliotHartley]

Hi, I'm not 100% sure but have you checked that your CGA is producing geometry with normals in the correct orientation?  You may need to share that code on here.