The structure of the model includes 3 seamless gypsum panels.
Dimensions:

Panel number 1
Height: 400mm.
Width: 462mm.
Thickness: 20mm.

Panel number 2
Height: 400mm.
Width: 400mm.
Thickness: 20mm.

Panel number 3
Height: 400mm.
Width: 400mm.
Thickness: 20mm.
Material library attached.
Render done in Corona 1.5

The model was modeled in the 2017 version of 3ds max; later the file was saved in the 2014 version of 3ds max as well as in the FBX 2006 format