The Stylized Sewers Generator builds whole sewer and catacomb levels in Blender from the included Stylized Sewers and Catacombs Kit, a set of 281 modular pieces in a painterly, hand painted style.

Add a level and pick a seed. The add-on lays out rooms and routes canal tunnels between them on 8 directions, with one connected water network that flows from room to room. Everything you see is built live by Geometry Nodes, so every setting updates the level.

Sliders control how often each element appears: loops, junctions, dead ends with culverts, outfalls onto a riverbank, 8 m wide collectors, 45 degree diagonals, Y forks, deeper floor levels reached over weirs with waterfalls, ladder shafts, well shafts and crawl pipes. Rooms can be octagon chambers with domes, cisterns with a pool in the middle, reservoir halls with pillars standing in deep water, galleries and canal halls. The Catacombs slider sets the share of the map with crypts and dry corridors with burial niches. A second storey sits 8 m above and joins through ladder shafts into floor hatches, and Start and Exit marks the two rooms the most tunnels apart.

Props, wear, lights, pipes, gates and bridges have their own settings. The water level goes from the canals up to flooded halls, flow arrows show which way the water runs, and Cutaway opens the level from above with an adjustable cut height. Dark, Torchlit, Murky and Day set up the light of the scene.

Export VTT Map writes a top down battle map as PNG with a Universal VTT file with walls and lights, with or without a grid, in daylight or lit only by the lanterns and torches. Export Level writes GLB or FBX for any engine, and the layout JSON lists every placed module and light for rebuilding a level from the kit in an engine.

The Geometry Nodes modifier stays editable and its node tree is grouped into readable sections. All kit pieces are also marked as assets in catalogs (Architecture, Water, Lights, Organic, Props), so you can build rooms by hand on the same 4 m grid.

What you get in Blender: the 281 pieces at LOD0 with packed textures. LODs, collision meshes and the demo levels are part of the engine versions of the kit (Unreal, Unity, Godot), which are sold separately as the Stylized Sewers and Catacombs Kit.

Every texture is generated procedurally by our own Python scripts in Blender. No texture libraries, scans or image generators were used.

Designed with Claude, modelled procedurally in Blender, reviewed and finished by a 3D artist.

Features

• One seed for layout and dressing; rooms, area and room size
• Connected canal network with diagonals, Y forks, T junctions, crossings, weirs and waterfalls
• Reservoir halls, cisterns, octagon domes, galleries, canal halls, crypts and burial corridors
• One or two storeys, with ladder shafts and floor hatches; optional start and exit
• Water level up to flooded halls, flow arrows
• Cutaway with adjustable cut height for top down views
• Light points on all light props, four light rigs for the scene
• Export as GLB or FBX, as battle map (PNG + .dd2vtt) and as layout JSON
• Geometry Nodes modifier with a tidy, editable node tree
• Includes the kit as a Blender asset library: 281 pieces, textures packed, 5 catalogs
• Grid: 4 x 4 m cells on 0.5 m, walls 4 m high, same grid as the Stylized Dungeon Generator

Requirements

Blender 5.2 or newer. Install: Edit > Preferences > Add-ons > Install from Disk, choose the ZIP. The panel is in the 3D Viewport sidebar (N) under Sewers.

License

The Python code of the add-on is licensed under the GNU GPL 3.0 or later. The 3D assets, textures and materials are royalty free for use in your own projects, commercial included. You may modify them, but you may not resell or redistribute the assets themselves.