i was so upset when i saw this window today. The clients had deleted the ‘background’ of the illustration without my knowledge. The final setup looks so incomplete! i could have adjusted the illustration if i’ve known that they changed their mind and wanted a see-through window instead.
The window area that is see-through is the ‘deleted’ background.
Original image. Initially, the illustration was to be printed on two layers – front on opaque sticker and back, translucent, so as to give it more depth.