Interesting. So why is something like this [0] possible, but the one in the first picture not?
[0] https://theglassroom.co.nz/wp-content/uploads/2019/04/23f059...
[0] https://theglassroom.co.nz/wp-content/uploads/2019/04/23f059...
Edit: Actually, I see what you were referring to now. The two pieces at the top of each window in the door. I can't say that I know how that was accomplished. I've never seen something like that before. It might be revealing to see an image with a higher resolution.