In the awesome Tabletop miniatures game Stargrave, there are two special abilities that drop a wall onto the play area. These are designed to represent those walls in play. I designed them thin to be printed solid, or you can do what I did when I printed mine and use vase mode a transparent filament for the effect.
If you like this type of stuff, I have a patreon with a huge archive of models for Tabletop Gaming in Fantasy, Sci Fi, Post-Apocalyptic and more! I specialize in terrain and gaming accessories for games like Gaslands, Star Wars Legion, Rangers of Shadow Deep, D&D, Frostgrave, A Billion Suns, Fallout, and much more!
