How to open the purple house door in Maquette. Once the cutscene is over in Maquette, pick up the key which appears and use it to open the door located to the north of the central dome.

Maquette is currently free on the PS5 — so grab it while it’s still available in March. ... Find the secret spot, and the world will change — the castle becomes a more humble purple home.

Now all that is left to do is use that key to bridge the gap in the model that leads to the purple house and enter that structure in regular size. Maquette is available now for PC, PS4, and PS5.

Run to the [Maquette], ... The colors for the second puzzle are in this order, from top to bottom: blue, green, orange, red, purple. Complete the second puzzle to unlock the Purple Tower.