KHR_materials_clearcoat defines a clear coating on a glTF PBR material.

Figure: Comparison of a carbon-fiber material without clearcoat (left) and with clearcoat (right). Source: Filament.

A clear coat is a common technique used in Physically-Based Rendering for a protective layer applied to a base material. Commonly used to represent car paint, carbon fiber, or thin lacquers.

Properties:

• Clearcoat

Example

import { MaterialsClearcoat, Clearcoat } from '@gltf-transform/extensions';

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

// Create Clearcoat property.
const clearcoat = clearcoatExtension.createClearcoat()
    .setClearcoatFactor(1.0);

// Assign to a Material.
material.setExtension('KHR_materials_clearcoat', clearcoat);