Mapify / tools
Laser shadow box
Finger-jointed flat pack: an open box (floor W×D, ceiling W×D, back W×H, two sides D×H) plus a mat frame with a rounded outer and a fingered inner cutout the same W×H as the opening—those slot fingers mate the top of the four walls around the front opening. Cut paths are red; optional engrave is filled black in the lower mat border (and you can set sheet layout + font). Cavity W/H/D are the clear inside for your print. Frame overhang is border beyond that opening (per side). Tab depth in the 2D cut equals material thickness. Kerf tightens along-edge fit; finger width is the tooth pitch along the edge.
3D preview
Mat: 276.2×197.5 mm outer; 200×121.3 mm opening. Cavity: 200×121.3×45.07 mm. Tray: two W×D, one W×H back, two D×H sides. Along-edge (finger − kerf) ≈ 8.90 mm. Tab depth = material T.