{
    "id": "TEST_ARID_WET", "name": "Rust Basin", "body_type": "planet",
    "planet_class": "arid", "body_scale": "planet", "seed": 44123,
    "star": {"type": "G", "luminosity_solar": 1.0, "color_temp_K": 5800},
    "orbit": {"distance_au": 1.1, "period_days": 420, "axial_tilt_deg": 10.0},
    "physical": {"gravity_g": 0.80, "oblateness": 0.002, "atmosphere": "standard", "atmosphere_color": [0.85, 0.60, 0.40]},
    "terrain": {"land_fraction": 0.82, "polar_ice_lat": 0.88, "tectonics": "low", "max_elevation_km": 14.0},
    "environment": {"geothermal_flux": "low", "uv_index": "moderate", "substrate": "silicate", "chemosynthetic": false, "hydrosphere": "liquid_water"},
    "clouds": {"enabled": true, "coverage_base": 0.15},
    "render": {"globe_light_angle_deg": 130, "specular_ocean": true, "night_side_ambient": 0.020}
}