Renaissance castle box — inspired by Rosenborg, the whole castle lifts off a hidden tray

A Dutch Renaissance castle, 240 × 108 × 250 mm, that is a box. The entire castle — brick walls, sandstone trim, copper-green roofs, three spired towers and the stair tower — is one four-colour print that lifts off a plain tray hidden inside it. Lift the castle and the tray stays on the table.

Read before you print

• It is not a 1:1 replica. The castle is inspired by Rosenborg Castle in Copenhagen, not a measured model of it. Proportions, window rhythm, towers, gables and sculpture are simplified and adapted to a 0.4 mm nozzle and to the box, and many details differ from the real building. Treat it as a castle of that era, after Rosenborg.

• It takes almost three days to print in colour. The four-colour castle slices to 2 d 23 h 46 min and about 1.1 kg with a four-slot automatic filament changer, colour changes and prime tower included. The tray adds 2 h 12 min. Check you have the spools, and the time, before starting.

Dimensions

At 100 % scale the castle needs 250 mm of build height; it was sliced on a printer with 256 mm.

Files

The four lid STLs are not four pieces to glue. They are the four colours of the same single print, cut from one coordinate frame. Use the 3MF or the four STLs, never both.

Filament

Tray: 106.8 g. Use one PLA family for all four colours so neighbouring regions bond. No magnets, screws, glue or paint. Have a deburring tool for the first-layer edges.

Print settings

• 0.4 mm nozzle, 0.2 mm layers, 3 walls, 15 % infill.

• Castle upright, 100 % scale, supports off. Roofs close on slopes and the lantern openings use pointed arches; the widest unsupported patch is 1.15 mm.

• No pause. No brim on the model; the prime tower keeps its own.

• Open rosenborg_lid_4colour.3mf as a project and match its four slots to your spools, then re-slice.

• Or select all four lid STLs in one import and answer Yes to "load as a single object with multiple parts". Check there are four parts under one object.

• Never use Split to Parts and never auto-orient the material files separately: the window frames and panes contain many separate colour islands.

• Print the tray on its own plate, flat floor down.

Test the fit first

Print both coupons with the castle and tray filament. Push the coupon tray into the socket: it should drop in and slide out freely. Remove any first-layer burr before judging. Too loose for your taste → lower clearance from 0.6 to 0.4 in the .scad and re-export the tray and its coupon. Do not scale one part in the slicer.

Assembly

Step 1 — the tray. Clean the bottom edges and set the empty tray on the table, opening up.

Step 2 — the castle. Lower the upright castle straight over the tray. Hold both and press the tray gently from underneath until its rim meets the hidden stops; the tray then sits 0.6 mm above the castle's bottom edge, so the joint disappears on a table.

To open, lift the castle by its lower walls. Nothing holds the tray in, so carry a loaded box by the tray, and never grip a spire or rest the castle on its towers.

Source

The parametric .scad is included: tray clearance, fit pads and the material split are named variables.