{
    "id": "TEST_BARREN", "name": "Scoria", "body_type": "planet",
    "planet_class": "barren", "body_scale": "planet", "seed": 77723,
    "star": {"type": "K", "luminosity_solar": 0.4, "color_temp_K": 4500},
    "orbit": {"distance_au": 0.2, "period_days": 45, "axial_tilt_deg": 2.0},
    "physical": {"gravity_g": 0.35, "oblateness": 0.001, "atmosphere": "none", "atmosphere_color": [0.5, 0.5, 0.5]},
    "terrain": {"land_fraction": 0.99, "polar_ice_lat": 0.95, "tectonics": "none", "max_elevation_km": 8.0},
    "environment": {"geothermal_flux": "low", "uv_index": "high", "substrate": "silicate", "chemosynthetic": false, "hydrosphere": "none"},
    "clouds": {"enabled": false},
    "render": {"globe_light_angle_deg": 130, "specular_ocean": false, "night_side_ambient": 0.008}
}