This thing is multi-colour coaster, displaying silhouette of the VL-3 ultralight airplane and my favourite hills just above our airport LKCHAR.

It was printed on MK3S+ with one extruder. The coaster is separated into several parts, each representing different layer which can be printed with different colour as is displayed in the images.

If you do not know how to do so, you can follow these instructions that I used: https://reprap.org/wiki/Multicolour_printing_with_one_hotend

To finish the object, I used transparent resin in order to achieve smooth surface of the coaster: https://www.artikon.cz/katalog/kategorie/nase-znacky/pebeo/kristalova-pryskyrice-gedeo-crystal-resin-750g