import { lights } from '../lights/lights' ; import vs from './pbr-vertex.glsl' ; import fs from './pbr-fragment.glsl' ; /**
 * An implementation of PBR (Physically-Based Rendering).
 * Physically Based Shading of a microfacet surface defined by a glTF material.
 */ export const pbr = { name : 'pbr' , vs , fs , defines : { LIGHTING_FRAGMENT : 1 } , dependencies : [ lights ] } ;