And the following is a picture of the model upside-down.
There are a lot of origami shadow boxes that look similar to this box, although with different proportions. There are for example Katrin and Yuri Shumakov's. Is the structure of any of those shadow boxes similar to that of the box I folded? Or are there any other origami boxes with a similar structure? I appreciate it if you can tell me the name of the related model and its creator, as well as its source. Even better if you can show me the model.
Thank you so much in advance.