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        shading: 'realistic',
        environment: ROOT_PATH + 'data-gl/asset/starfield.jpg',
        realisticMaterial: {
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        viewControl: {
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        light: {
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                intensity: 2,
                shadow: true
            },
            ambientCubemap: {
                texture: ROOT_PATH + 'data-gl/asset/pisa.hdr',
                exposure: 2,
                diffuseIntensity: 2,
                specularIntensity: 2
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};