Define the KHR_materials_dispersion extension materials options.
Define the KHR_materials_emissive_strength extension materials options.
Define the KHR_materials_ior extension materials options.
Define the KHR_materials_transmission extension materials options.
Define the KHR_materials_specular extension materials options.
Define the KHR_materials_unlit extension materials options.
Define the KHR_materials_volume extension materials options.
Base mapping for all potential GLTF materials extensions types.