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Crucible Grounds Crucible Docs

Live 3D preview

Crucible shows your terrain in a live 3D preview that updates instantly as you adjust sliders or brush the terrain. This lets you read elevation, coastline shape and terrain features as you work instead of guessing from a flat grayscale image. You can see exactly how your terrain will look in game before you export and import into RustEdit.

The live 3D preview in Crucible Heightmap showing a Rust island as shaded 3D terrain over water

What views and overlays are there?

Section titled “What views and overlays are there?”
  • 3D and 2D: toggle between a shaded 3D view of your terrain (shows how it generally looks in game) and a flat 2D heightmap view (the raw 16-bit grayscale image). Use 3D to evaluate shape and lighting, use 2D to check pixel-precise elevation values.

The flat 2D heightmap view in Crucible Heightmap, a 16-bit grayscale image where brighter pixels are higher elevation

  • Grid overlay: see your map laid out against a grid that approximates Rust’s cell grid (not exactly the same, but close enough for planning). Useful for understanding map scale and checking how terrain aligns with world chunks. Turn it on when planning monument placement before RustEdit.

The grid overlay in Crucible Heightmap showing Rust map cells projected over the 3D terrain

  • Slope view: highlights steep, unbuildable areas in warm colors and flat, buildable ground in green. Use this to spot cliffs, verify buildable ground distribution, and plan where players will likely construct bases.

The slope view in Crucible Heightmap highlighting steep, unbuildable terrain in warm colors and flat ground in green

  • Sun and time: change the light angle and sun position to preview how slopes and cliffs will shade in game. Helps you evaluate visual contrast and read the terrain better.
  • Minimap: a small floating overview showing your whole map as a secondary view.

The preview updates as you move sliders or combine islands, so you shape the map with immediate feedback before you export. See Status bar for info on the indicators shown at the bottom of the workspace.