World Forger

Procedurally generate villages, roads and prop layouts from a node graph. Deterministic seeds, stackable spawn filters, live preview and a full runtime API. Ships with a 475-prefab medieval kit.

• Requires Unity 6.3 or later and the Unity Splines package. The core runtime assembly has no other dependencies
• Node-based stencil graph editor — stamp rules, prefab arrays, child stamps, probability, stop-flow, per-choice offsets
• Deterministic output: fixed seeds with spatial salting, so the same seed reproduces the same layout every time
• Two Forgers included: Village Forger (roads, squares, residential tiers, specialised buildings, obstacle avoidance) and Prefab Forger (general scatter and placement)
• 42 named road layouts — grid, ring, spiral, dendritic, herringbone, cul-de-sacs and more
• Six stock spawn filters: Min Distance, Max Slope, Height Range, Snap To Grid, Align To Terrain Normal, Material Swap — stackable per prefab choice
• Live preview fast path, full Undo integration, and per-instance tracking so edits recompose without a full rebuild
• Runtime API: Build() / Demolish() with ForgeStarted, ForgeCompleted, ForgeFailed and Demolished events, plus optional auto-build on start
• Extension points for custom spawn filters, graph validators, exporters, node context menus and inspector tools — register by attribute, no core edits
• Editor tooling: Welcome window, Stencil Graph Browser, Variant Generator, Village Profile Browser
• Optional integrations, MicroVerse
• Crooked Hollow sample: 475 prefabs, 383 FBX meshes, one shared 2048 atlas with 4 colour schemes, LOD groups on every mesh prefab, 7 demo scenes

World Forger is a node-based procedural placement system for Unity. You build a stencil in a graph editor (stamp rules, prefab choices, child stamps, spawn filters) and a Forger component turns it into scene geometry. Every build runs from a fixed seed, so the same stencil always gives the same result, and re-rolling the seed gives you a new variation of the same design.

Two main Forgers come with it. Village Forger lays out complete settlements: main and side roads, a village square, residential tiers, specialised buildings, ground cover and obstacle avoidance, all driven by a profile you can tune or swap. Prefab Forger is the general-purpose one: scatter, grids, walls, decoration, anything you can describe as stamps and rules. Experimental Countryside, Road, Stream and Bridge Forgers and spline terrain tools fill the land between settlements.

Nothing about the system is tied to the included art. A stencil references your prefabs, so the same graph that builds a medieval hamlet will build a sci-fi outpost or a suburban street when you point it at a different kit. The core runtime assembly has no package dependencies and doesn’t touch materials or shaders. It only instantiates prefabs, so it works with whatever render pipeline your prefabs use.

REQUIREMENTS

• Unity 6.3 LTS or later.

• Unity’s Splines package (com.unity.splines 2.8.2 or later, free from the Unity Registry) for the Village Forger, the experimental Forgers and terrain tools, and all samples. World Forger offers to install it when the project opens. Without it, the Prefab Forger and the core still work.

INCLUDED SAMPLE: CROOKED HOLLOW (no extra purchase needed)

The Crooked Hollow kit is a working example: 475 prefabs across houses, shops, thatched cottages, ruins, rocks, plants, paving, market kits and hero pieces, all sharing one 2048 atlas with four colour schemes (Default, Autumn, Nordic, Desert). Seven sample scenes cover the feature set, from a 42-layout road catalogue to obstacle avoidance, boundary splines, theme swapping and a runtime API playground. The scenes ship empty and rebuild from their seeds at the press of a button, which keeps the download small without losing anything. It needs only World Forger and Splines.

THIRD-PARTY ART SAMPLES (require separately purchased packs)

Three more samples come as packed .unitypackage files. Each one shows World Forger building with another publisher’s art. That art is not included with World Forger, and each sample works only if you own and import the packs listed for it:

• Polytope Low Poly Modular Village sample needs all three of Polytope Studio’s packs, plus their URP conversions:

– Low Poly Modular Village: https://assetstore.unity.com/packages/3d/environments/low-poly-modular-village-lowpoly-medieval-fantasy-series-258073

– Low Poly Environment Nature: https://assetstore.unity.com/packages/3d/environments/low-poly-environment-nature-lowpoly-medieval-fantasy-series-185195

– Low Poly Tools & Props: https://assetstore.unity.com/packages/3d/props/low-poly-tools-props-lowpoly-medieval-fantasy-series-268353

• Polyart Dreamscape Village sample needs Polyart Studio’s Dreamscape Village - Stylized Fantasy Open World:

https://assetstore.unity.com/packages/3d/environments/fantasy/dreamscape-village-stylized-fantasy-open-world-244797

• Synty Fantasy Kingdom sample needs Synty Studios’ POLYGON - Fantasy Kingdom Pack:

https://assetstore.unity.com/packages/3d/environments/fantasy/polygon-fantasy-kingdom-pack-art-by-synty-164532

These three samples are set up for URP.

OPTIONAL: MICROVERSE INTEGRATION (requires paid third-party assets)

World Forger can optionally hand its village roads to MicroVerse. This requires Jason Booth’s MicroVerse and MicroVerse Splines 1.x, both paid Asset Store products sold separately. It is tested with MicroVerse 1.7.0. Without them, the integration simply stays hidden and everything else works.

– MicroVerse - Core: https://assetstore.unity.com/packages/tools/terrain/microverse-232972

– MicroVerse - Splines: https://assetstore.unity.com/packages/tools/terrain/microverse-splines-232974

The sample art is medieval/fantasy village, but the tool itself works in any genre.