About this 3D model

For Christmas this year, I made my sister a lithophane of our late father and her children. Needing a nice display case for it, I designed this one. It is designed to take standard 4x6" photos-turned-lithophanes with a depth of 3mm and sized 100x146mm in the portrait (up and down) orientation. If there is enough interest, I may remix this into a complimentary landscape mode display.