KHR_materials_pbrSpecularGlossiness converts a PBR material from the default metal/rough workflow to a spec/gloss workflow.

NOTICE: The spec/gloss workflow does not support other PBR extensions such as clearcoat, transmission, IOR, etc. For the complete PBR feature set and specular data, use the MaterialsSpecular extension instead, which provides specular data within a metal/rough workflow.

Figure: Components of a PBR spec/gloss material. Source: Khronos Group.

Properties:

• PBRSpecularGlossiness

Example

import { MaterialsPBRSpecularGlossiness } from '@gltf-transform/extensions';

// Create an Extension attached to the Document.
const specGlossExtension = document.createExtension(MaterialsPBRSpecularGlossiness);

// Create a PBRSpecularGlossiness property.
const specGloss = specGlossExtension.createPBRSpecularGlossiness()
    .setSpecularFactor(1.0);

// // Assign to a Material.
material.setExtension('KHR_materials_pbrSpecularGlossiness', specGloss);