SAM'S FORGE

SUBSTRATA-READY WORLD AUTHORING

BUILD THE WORLD.

A fast browser-based toolkit for creators who want editable structures, procedural materials, sculpted terrain, clean GLB output, float32 EXR heightfields, and RGB material masks. Built for creating worlds in Substrata.

SUBSTRATA WEBSITE
01 · ARCHITECTURE

Structure Builder

Draw architectural forms directly and export editable, game-ready structures without entering a full modeling application.

  • Walls, arcs, vaults, domes, floors, ceilings, and roofs
  • Door and window openings
  • Whole-object and individual-surface material assignment
  • AI-readable project JSON and GLB export
02 · SURFACES

Material Lab

Create procedural PBR materials independently. New and updated slots refresh when you open Structure Builder.

  • Concrete, wood, clay, metal, stone, and plaster presets
  • Base color, normal, ORM, and height maps
  • Live 3D preview and editable material recipes
  • Texture-map ZIP export
03 · OBJECTS

Prop Generator

Create dimensionally editable furniture, doors, and windows from practical presets, then export named GLB parts.

  • Couches, chairs, tables, desks, and beds
  • Doors with frames, panels, glass inserts, and handles
  • Windows with frames, mullions, glass, and sills
  • Shared project material import and editable JSON
04 · LANDSCAPE

Terrain Sculpt + Mask Painter

Start with an island, archipelago, square, or empty ocean and draw the actual elevation field.

  • Connected mountain-range strokes
  • Lowlands, beaches, rivers, valleys, smoothing, and sea carving
  • Automatic RGB mask generation with manual paint overrides
  • Substrata-ready float32 EXR export

SHARED WORKFLOW

01 · CREATEDraw structures or sculpt the terrain directly.
02 · REFINEAdjust materials, surfaces, elevation, and masks.
03 · PREVIEWInspect the result before export.
04 · EXPORTSend GLB, EXR, PNG, or project JSON into your world pipeline.