On Game Terrain Engineering, Jim Kelly posted this great tutorial on building a wall-mounted display for your lovingly-painted fantasy miniatures collection. The display, while looking quite elaborate and substantial, is little more than a cheap wooden picture frame, some foam board, and lots of time and hot glue. The Archdevil Moloch statue in the middle was 3D printed. That is, of course, optional. https://youtu.be/T0PTvqKX_NE
Months ago, well-known dungeon crafter, DM Scotty, posted some similar wall displays on Facebook that used a printed image on their back walls (relevant to the theme of the minis on display) and simpler shelving. Scotty's might be an overall better solution for displaying your minis in a less busy but still thematic way. Jim admits that the lighting/viewability of some of the miniatures on his dungeon-themed display is not the best. He's considering adding LED lighting.
I am definitely going to build some of these displays. With all of the time I'm putting into painting minis these days, I don't want to hide my hard work away in cases when it could be enjoyed by others. I think this is a really fun way to do it. I can't wait to plan out and create thematic frame-displays for my Frostgrave, Gaslands, Blood Bowl, and All Quiet on the Martian Front minis. For displaying years of collected Warhammer 40,000 armies? We're going to need a bigger boat.
BTW: The latest D&D game book, Mordenkainen's Tome of Foes, includes the exiled Archdevil Moloch in its bestiary, with great artwork, background, and stat block. Old school roleplayers will remember the gem-eyed Moloch statue being looted on the cover of the first AD&D Players Handbook. Mordenkainen's bestiary also includes Eidolons, the undead spirits that get bound into statues, and even a stat block for Sacred Statue, the Moloch statue featured on that early D&D cover.