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Atomic Shelter is a shelter / bunker generator that builds complete retro-futuristic nuclear shelters in one click, from the giant cog-shaped gear door at the end of a rock cave down to the reactor on the deepest floor.

It works like a smart dungeon generator. You pick how many floors and which rooms, and the planner lays out every floor around a stairwell, an elevator and an atrium open through several floors. It joins the rooms with corridors, places the dangerous and industrial rooms deep and the overseer at the top, and furnishes every room for what it is.

Everything is controllable and everything rebuilds live: floors, room counts and floors per room, layout seed, corridor loops, atrium size, colors, condition and the gear door.

The gear door rolls open
Animate Opening keyframes the whole sequence: the door unseals, the gantry pulls it out of its frame and rolls it aside on the toothed rack.

A new shelter in one click
Surprise Me plans a fresh shelter every time: floors, rooms, corridors, atrium, colors and condition. Shown here as cutaways of the top floor.

Every room is furnished
Diner, reactor, lab, hydroponic farm, workshop, quarters, cryo chamber and more: 20 room types, each filled with detailed props for what it is.

From opening day to ruins
One setting takes the same shelter from spotless to lived in, old and dirty, or ruined and rusty, with sliders for dirt, damage, rust, clutter and dead lights.

What it builds

• A gear door entrance: a cog-shaped door that a gantry pulls out of its frame and rolls aside on a toothed rack, with an animate button
• A rock cave tunnel with a steel platform, console, caged lamps, a rotating beacon and daylight at its end
• An atrium through several floors with balconies, grand stairs and the overseer's window
• A stairwell, an elevator, corridors with pipes, valves, intercoms, alarm bells and posters
• 20 room types: quarters, dormitories, a diner cafeteria, classroom, recreation, washroom, clinic, overseer, security, armory, hydroponic farm, livestock barn, storage, lab, cryo, mainframe, workshop, water purification and the reactor
• Atomic-age walls: blue lower bands, yellow rails, ribs, cove ceilings, sliding doors with signs
• Room names, level numbers, warnings and posters as image textures, never mesh text

Condition and style

• New, Lived In, Old & Dirty and Ruined & Rusty, plus sliders for dirt, damage, rust, clutter and dead lights
• Five color styles or your own colors, flickering lights, real lamps with a lamp budget

Made for renders and games

• Photoreal PBR materials from Poly Haven scans that also work in game engines
• Game-Ready Copy bakes every material into PBR textures (base color, roughness, metallic, normal, emission) for FBX and glTF export to Unity, Unreal and Godot
• Convert to Mesh for editing, one object per floor and part
• Surprise Me gives a random shelter in one click

Requires Blender 4.2 or newer. Tested on Blender 4.2, 4.5 and 5.2 LTS.