Thank you for your kind words @Anton_Aleknavitsus and for your comment. In fact it is not a bug but a feature 
although maybe not so elegant in execution. The thing that we were provided with photoshoot of the exterior views but it was done through the windows as the builiding already exists. That is why it was almost impossible to shoot straight down so there is a place where the outside panorama ends at the bottom and at the top. That is why we decided to block the possibility to go near the windows so the cut outside view doesn’t distract the viewer. Maybe I will come out with a smarter idea the other time
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