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Worlds / Physical
Physical Model
Physical modeling defines the world's non-negotiable envelope before settlement, ecology, or extraction appear. Matter, scale, climate rhythm, terrain energy, and seasonal windows determine what later layers are allowed to do.
MatterClimate rhythmScaleHazard windows
Operational lenses currently organizing this world layer.
Curated stages that turn this world layer into a usable sequence.
Entries currently surfaced as the reading base for this layer.
Program And Scale
Browse this layer by program branch and operating scale.
This world layer now exposes program branches and scale lanes directly, so layer-level browse stays compatible with the same taxonomy used across the wider graph.
World Foundations
Explain what the world is materially built from before politics, balance, or style are discussed.
Start in Worlds, read the anchor framework, open one regional model, validate with a complete study, then finish with a world assembly guide pass.
Regional Scale · 6World Scale · 2Cross-Scale · 1
Spatial Structures
Explain how topology, region graphs, corridors, map abstraction, and scale determine movement and leverage.
Start in Spatial, reduce the map into region graph and corridor logic, test topology under disruption, then return through a spatial design guide.
Cross-Scale · 1
Urban and Regional Coupling
Explain how cities work as filters, gateways, relays, conversion surfaces, and regional control machines.
Start with the urban logistics surface, step into gateway and throughput models, compare a port or capital study, then run a city-region worksheet.
Urban Scale · 1
Show scale lanes
Regional Scale
Use this scale when the region is the main leverage unit for settlement, extraction, governance, or conflict.
Cross-Scale
Use this scale when the strongest explanation depends on several levels staying visible together.
World Scale
Use this scale when the whole world model or planetary constraint pattern should stay visible at once.
Urban Scale
Use this scale when city-scale transfer, concentration, or control is doing the main structural work.
What It Governs
This layer decides what the rest of the world can plausibly inherit.
Start with the hard substrate. If the physical layer is vague, every later explanation turns into decorative lore instead of structural consequence.
Planetary Envelope
Lock in gravity, atmospheric behavior, temperature range, hydrology, and any exceptional material rules that shape everyday survival.
Constraint Map
Translate abstract physics into usable gradients: sheltered basins, storm belts, flood plains, glaciated edges, volcanic corridors, and dry interiors.
Energy Budget
Ask where heat, water, food production, and mechanical movement remain cheap enough to sustain density over time.
Failure Test
Check whether politics, settlement, and ecology behave as if these conditions are real, not as if the world secretly runs on generic temperate-Earth assumptions.
Featured Reading
Editorial starting points inside this layer.
Use these entries when you want the clearest current examples before following the full reading path.
framework
Featured4 structural layers
Regional Systems Matrix
A planning frame for mapping how geography, settlement, resources, and transit form a region's structural identity.
WorldsWorld FoundationsRegionalgeographyresourcessystems
Curated Reading
Readings that turn physics into usable world structure
These entries convert raw terrain and climatic constraint into settlement gradients, corridor logic, and map stress tests.
01
Reading Stage
Stage 1: Turn hard constraints into a regional frame
Begin by mapping terrain, settlement, resources, and infrastructure as one field instead of separate lists.
Outcome
You leave with a physical world that already has leverage zones, not only landforms.
World Foundations currently leads this stage with 6 supporting entries.
World Foundations · 6
Regional Scale currently anchors this stage with 3 supporting entries.
Regional Scale · 3World Scale · 2
framework
5 constraint layers
World Constraint Stack
A framework for reading a world from climate rhythm, terrain friction, habitability, circulation, and settlement thresholds before higher-order institutions are added.
WorldsWorld FoundationsWorldgeographyresourcesevolution
framework
4 continuity layers
Material Continuity Framework
A framework for reading how food, water, health, and maintenance cycles must keep reproducing beneath settlement, surplus, and political order.
WorldsWorld FoundationsCross Scaleresourcessystemsevolution
framework
Featured4 structural layers
Regional Systems Matrix
A planning frame for mapping how geography, settlement, resources, and transit form a region's structural identity.
WorldsWorld FoundationsRegionalgeographyresourcessystems
framework
4 density bands
Terrain Settlement Gradient
A framework for reading how terrain friction and access gradients shape where settlement density can sustainably accumulate.
WorldsWorld FoundationsRegionalgeographycivilizationresources
model
4 recurring windows
Climate Rhythm Model
A model for how repeating weather and seasonal windows structure labor, harvest timing, travel reliability, and crisis pacing across a world.
WorldsWorld FoundationsWorldgeographyresourcesevolution
model
4 intake layers
Food Energy Base Model
A model for tracing how staples, fuel, fodder, labor conversion, and storage create the recurring intake that makes density and surplus possible.
WorldsWorld FoundationsRegionalresourcessystemsgeography
Applied Validation
Validate physical inside complete worlds.
Do not stop at the model alone. Use these assembled examples and applied studies to see whether physical still behaves coherently once the rest of the world stack is present.
Open one complete case after the model is clear.
Treat these entries as structural proof, not bonus reading. The question is whether this world layer still explains behavior when the full setting comes online.
Use examples and studies for different validation jobs.
Examples show assembled worldbuilding from the inside. Studies give you comparison cases with different route, pressure, and institutional conditions.
Come back with one concrete revision target.
After one proof read, identify whether the next fix belongs in substrate, routes, resources, institutions, or history, then reopen that layer directly.
study
Featured2 chokepoint classes
Mountain Basin Civilization
A sample systems study showing how basin agriculture, defensive ridges, and narrow passes produce a dense but brittle civilization pattern.
Cross ModuleWorld FoundationsRegionalgeographycivilizationresources
Design Checklist
Use these prompts to keep the model operational.
Open this only when you are actively revising a world layer instead of browsing for orientation.
Open the design checklist
- Decide what counts as normal weather, normal travel, and normal harvest timing.
- Mark which materials, elevations, or biomes create hard cost cliffs instead of mild inconvenience.
- Define the main seasonal or cyclical shifts that repeatedly reshape risk and throughput.
- Show where water, warmth, shelter, and stable soils overlap rather than treating habitability as uniform.
- Explain why some zones stay dense while others only support transient use, extraction, or fortification.
- Tie physical variation to corridor formation, storage behavior, and recurring scarcity windows.
- Extreme climates with societies that operate like mild-climate agrarian states.
- Spectacular terrain that never changes logistics, travel speed, or administrative burden.
- Catastrophic events that exist in lore but never alter infrastructure, storage, or settlement practice.
Cross-model Handoff
Continue from substrate into applied world layers
Once the physical layer is credible, carry it forward into regional form, ecological fit, and resource dependency.
Next layer
Geography Model
Turn terrain and friction into regions, corridors, chokepoints, and route hierarchies.
Living systemsEcology Model
Translate climate, water, and disturbance into survival logic, biomes, and adaptation pressure.
Economic pressureResource Model
Trace how deposits and fertile zones become transport chains, storage sites, and leverage.
Module overviewOpen Worlds
Return to the parent module and compare this layer against the rest of the world stack.
Physical modeling matters because every plausible civilization, ecology, and resource system is negotiating the same hard world underneath.