{
    "model": ["SnerfFast", {
        "color": "rgb",
        "sampler": {
            "n_samples": 32
        },
        "encoder_x": ["Freq", {
            "freqs": 6,
            "cat_input": true
        }],
        "num_fields": 2,
        "field": {
            "shape": [4, 256],
            "skips": []
        }
    }],
    "train": ["Trainer", {
        "max_epochs": 20,
        "opti": ["Adam", {
            "lr": 5e-4
        }],
        "loss": {
            "Color_L2": "mse_loss(color, gt_color)",
            "Density_Reg": ["cauchy_loss(densities)", {"s": 4}]
        }
    }]
}