Terrain

Generate a procedural 3D terrain mesh

Pick an algorithm, a seed and a resolution and get a downloadable OBJ terrain with biome vertex colors. Generation is deterministic, so the same inputs always give the same terrain. It runs on the server CPU, with no GPU or AI model involved.

Open the terrain generatorPricing
Cost
1 credit per run
API
POST /api/v1/tools/terrain-generator
This tool runs on the server CPU. You must be signed in and each run is metered in credits against your account. The API needs a paid plan with an API key.

How it works

  1. Choose an algorithm: hybrid, fbm, ridged, billow, cellular, domain-warp, island, terraces or dunes.
  2. Set seed, resolution, height, erosion steps and sea level.
  3. Download the OBJ or continue editing it in the studio.

API example

curl -X POST https://simplexgen.com/api/v1/tools/terrain-generator \
  -H "Authorization: Bearer $SIMPLEXGEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "algorithm": "island",
  "erosion_steps": 8,
  "height": 4,
  "island_strength": 0.9,
  "resolution": 65,
  "seed": 2026,
  "terrace_levels": 0
}'

Create an API key on your account page. See the API documentation for the full response format.

Questions

Are results reproducible?

Yes. The seed and parameters fully determine the mesh.

What is the maximum resolution?

Resolution is clamped to 9 to 129 vertices per side.

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