Since I mentioned I am into scale modeling and 3D printing, here is today's print - the interior of a swiss battery-powered railcar (Bda 2/2, produced by SIG and Sécheron in 1946) of the Meiringen - Innertkirchen Bahn.
Model scale is 1/87 (continental Europe H0). This is a test print to check dimensional tolerances, hence the "topographic" effect.
The rest of the railcar is being designed as I write.