Hello there,
Thank you for asking. Let's get the details you need.
Yes, you need to use the glass panel or the Bespoke panels. We do not recommend that a cabinet maker make custom panels, as they are not compatible with Samsung Bespoke refrigerators.
Here is a link for the available Bespoke Panels.
Change your Samsung BESPOKE refrigerator panels
https://www.samsung.com/us/support/answer/ANS00088645/
Have a great day.
^Camille