/**
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* Get default parameters for physically based rendering. These defaults
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* describe a rough dielectric (non-metal) surface (e.g. rough plastic).
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*
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* @return {czm_pbrParameters} Default parameters for {@link czm_pbrLighting}
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*/
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czm_pbrParameters czm_defaultPbrMaterial()
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{
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czm_pbrParameters results;
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results.diffuseColor = vec3(1.0);
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results.roughness = 1.0;
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const vec3 REFLECTANCE_DIELECTRIC = vec3(0.04);
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results.f0 = REFLECTANCE_DIELECTRIC;
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return results;
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}
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