KHRMaterialsDiffuseTransmission

KHR_materials_diffuse_transmission defines diffuse transmission on a glTF PBR material.

Figure: Sphere using KHR_materials_diffuse_transmission with varying roughness (0.0, 0.2, 0.4). Source: Khronos Group.

Adds a Lambertian diffuse transmission BSDF to the metallic-roughness material. Thin, dielectric objects like leaves or paper diffusely transmit incoming light to the opposite side of the surface. For optically thick media (volumes) with short scattering distances and therefore dense scattering behavior, a diffuse transmission lobe is a phenomenological plausible and cheap approximation.

Properties:

• DiffuseTransmission

Example

import { KHRMaterialsDiffuseTransmission, DiffuseTransmission } from '@gltf-transform/extensions';

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

// Create DiffuseTransmission property.
const diffuseTransmission = diffuseTransmission.createDiffuseTransmission()
.setDiffuseTransmissionFactor(1.0);

// Assign to a Material.
material.setExtension('KHR_materials_diffuse_transmission', diffuseTransmission);