parse( json ) {

		const textures = this.textures;

		function getTexture( name ) {

			if ( textures[ name ] === undefined ) {

				console.warn( 'THREE.MaterialLoader: Undefined texture', name );

			}

			return textures[ name ];

		}

		const material = this.createMaterialFromType( json.type );

		if ( json.uuid !== undefined ) material.uuid = json.uuid;
		if ( json.name !== undefined ) material.name = json.name;
		if ( json.color !== undefined && material.color !== undefined ) material.color.setHex( json.color );
		if ( json.roughness !== undefined ) material.roughness = json.roughness;
		if ( json.metalness !== undefined ) material.metalness = json.metalness;
		if ( json.sheen !== undefined ) material.sheen = json.sheen;
		if ( json.sheenColor !== undefined ) material.sheenColor = new Color().setHex( json.sheenColor );
		if ( json.sheenRoughness !== undefined ) material.sheenRoughness = json.sheenRoughness;
		if ( json.emissive !== undefined && material.emissive !== undefined ) material.emissive.setHex( json.emissive );
		if ( json.specular !== undefined && material.specular !== undefined ) material.specular.setHex( json.specular );
		if ( json.specularIntensity !== undefined ) material.specularIntensity = json.specularIntensity;
		if ( json.specularColor !== undefined && material.specularColor !== undefined ) material.specularColor.setHex( json.specularColor );
		if ( json.shininess !== undefined ) material.shininess = json.shininess;
		if ( json.clearcoat !== undefined ) material.clearcoat = json.clearcoat;
		if ( json.clearcoatRoughness !== undefined ) material.clearcoatRoughness = json.clearcoatRoughness;
		if ( json.dispersion !== undefined ) material.dispersion = json.dispersion;
		if ( json.iridescence !== undefined ) material.iridescence = json.iridescence;
		if ( json.iridescenceIOR !== undefined ) material.iridescenceIOR = json.iridescenceIOR;
		if ( json.iridescenceThicknessRange !== undefined ) material.iridescenceThicknessRange = json.iridescenceThicknessRange;
		if ( json.transmission !== undefined ) material.transmission = json.transmission;
		if ( json.thickness !== undefined ) material.thickness = json.thickness;
		if ( json.attenuationDistance !== undefined ) material.attenuationDistance = json.attenuationDistance;
		if ( json.attenuationColor !== undefined && material.attenuationColor !== undefined ) material.attenuationColor.setHex( json.attenuationColor );
		if ( json.anisotropy !== undefined ) material.anisotropy = json.anisotropy;
		if ( json.anisotropyRotation !== undefined ) material.anisotropyRotation = json.anisotropyRotation;
		if ( json.fog !== undefined ) material.fog = json.fog;
		if ( json.flatShading !== undefined ) material.flatShading = json.flatShading;
		if ( json.blending !== undefined ) material.blending = json.blending;
		if ( json.combine !== undefined ) material.combine = json.combine;
		if ( json.side !== undefined ) material.side = json.side;
		if ( json.shadowSide !== undefined ) material.shadowSide = json.shadowSide;
		if ( json.opacity !== undefined ) material.opacity = json.opacity;
		if ( json.transparent !== undefined ) material.transparent = json.transparent;
		if ( json.alphaTest !== undefined ) material.alphaTest = json.alphaTest;
		if ( json.alphaHash !== undefined ) material.alphaHash = json.alphaHash;
		if ( json.depthFunc !== undefined ) material.depthFunc = json.depthFunc;
		if ( json.depthTest !== undefined ) material.depthTest = json.depthTest;
		if ( json.depthWrite !== undefined ) material.depthWrite = json.depthWrite;
		if ( json.colorWrite !== undefined ) material.colorWrite = json.colorWrite;
		if ( json.blendSrc !== undefined ) material.blendSrc = json.blendSrc;
		if ( json.blendDst !== undefined ) material.blendDst = json.blendDst;
		if ( json.blendEquation !== undefined ) material.blendEquation = json.blendEquation;
		if ( json.blendSrcAlpha !== undefined ) material.blendSrcAlpha = json.blendSrcAlpha;
		if ( json.blendDstAlpha !== undefined ) material.blendDstAlpha = json.blendDstAlpha;
		if ( json.blendEquationAlpha !== undefined ) material.blendEquationAlpha = json.blendEquationAlpha;
		if ( json.blendColor !== undefined && material.blendColor !== undefined ) material.blendColor.setHex( json.blendColor );
		if ( json.blendAlpha !== undefined ) material.blendAlpha = json.blendAlpha;
		if ( json.stencilWriteMask !== undefined ) material.stencilWriteMask = json.stencilWriteMask;
		if ( json.stencilFunc !== undefined ) material.stencilFunc = json.stencilFunc;
		if ( json.stencilRef !== undefined ) material.stencilRef = json.stencilRef;
		if ( json.stencilFuncMask !== undefined ) material.stencilFuncMask = json.stencilFuncMask;
		if ( json.stencilFail !== undefined ) material.stencilFail = json.stencilFail;
		if ( json.stencilZFail !== undefined ) material.stencilZFail = json.stencilZFail;
		if ( json.stencilZPass !== undefined ) material.stencilZPass = json.stencilZPass;
		if ( json.stencilWrite !== undefined ) material.stencilWrite = json.stencilWrite;

		if ( json.wireframe !== undefined ) material.wireframe = json.wireframe;
		if ( json.wireframeLinewidth !== undefined ) material.wireframeLinewidth = json.wireframeLinewidth;
		if ( json.wireframeLinecap !== undefined ) material.wireframeLinecap = json.wireframeLinecap;
		if ( json.wireframeLinejoin !== undefined ) material.wireframeLinejoin = json.wireframeLinejoin;

		if ( json.rotation !== undefined ) material.rotation = json.rotation;

		if ( json.linewidth !== undefined ) material.linewidth = json.linewidth;
		if ( json.dashSize !== undefined ) material.dashSize = json.dashSize;
		if ( json.gapSize !== undefined ) material.gapSize = json.gapSize;
		if ( json.scale !== undefined ) material.scale = json.scale;

		if ( json.polygonOffset !== undefined ) material.polygonOffset = json.polygonOffset;
		if ( json.polygonOffsetFactor !== undefined ) material.polygonOffsetFactor = json.polygonOffsetFactor;
		if ( json.polygonOffsetUnits !== undefined ) material.polygonOffsetUnits = json.polygonOffsetUnits;

		if ( json.dithering !== undefined ) material.dithering = json.dithering;

		if ( json.alphaToCoverage !== undefined ) material.alphaToCoverage = json.alphaToCoverage;
		if ( json.premultipliedAlpha !== undefined ) material.premultipliedAlpha = json.premultipliedAlpha;
		if ( json.forceSinglePass !== undefined ) material.forceSinglePass = json.forceSinglePass;

		if ( json.visible !== undefined ) material.visible = json.visible;

		if ( json.toneMapped !== undefined ) material.toneMapped = json.toneMapped;

		if ( json.userData !== undefined ) material.userData = json.userData;

		if ( json.vertexColors !== undefined ) {

			if ( typeof json.vertexColors === 'number' ) {

				material.vertexColors = ( json.vertexColors > 0 ) ? true : false;

			} else {

				material.vertexColors = json.vertexColors;

			}

		}

		// Shader Material

		if ( json.uniforms !== undefined ) {

			for ( const name in json.uniforms ) {

				const uniform = json.uniforms[ name ];

				material.uniforms[ name ] = {};

				switch ( uniform.type ) {

					case 't':
						material.uniforms[ name ].value = getTexture( uniform.value );
						break;

					case 'c':
						material.uniforms[ name ].value = new Color().setHex( uniform.value );
						break;

					case 'v2':
						material.uniforms[ name ].value = new Vector2().fromArray( uniform.value );
						break;

					case 'v3':
						material.uniforms[ name ].value = new Vector3().fromArray( uniform.value );
						break;

					case 'v4':
						material.uniforms[ name ].value = new Vector4().fromArray( uniform.value );
						break;

					case 'm3':
						material.uniforms[ name ].value = new Matrix3().fromArray( uniform.value );
						break;

					case 'm4':
						material.uniforms[ name ].value = new Matrix4().fromArray( uniform.value );
						break;

					default:
						material.uniforms[ name ].value = uniform.value;

				}

			}

		}

		if ( json.defines !== undefined ) material.defines = json.defines;
		if ( json.vertexShader !== undefined ) material.vertexShader = json.vertexShader;
		if ( json.fragmentShader !== undefined ) material.fragmentShader = json.fragmentShader;
		if ( json.glslVersion !== undefined ) material.glslVersion = json.glslVersion;

		if ( json.extensions !== undefined ) {

			for ( const key in json.extensions ) {

				material.extensions[ key ] = json.extensions[ key ];

			}

		}

		if ( json.lights !== undefined ) material.lights = json.lights;
		if ( json.clipping !== undefined ) material.clipping = json.clipping;

		// for PointsMaterial

		if ( json.size !== undefined ) material.size = json.size;
		if ( json.sizeAttenuation !== undefined ) material.sizeAttenuation = json.sizeAttenuation;

		// maps

		if ( json.map !== undefined ) material.map = getTexture( json.map );
		if ( json.matcap !== undefined ) material.matcap = getTexture( json.matcap );

		if ( json.alphaMap !== undefined ) material.alphaMap = getTexture( json.alphaMap );

		if ( json.bumpMap !== undefined ) material.bumpMap = getTexture( json.bumpMap );
		if ( json.bumpScale !== undefined ) material.bumpScale = json.bumpScale;

		if ( json.normalMap !== undefined ) material.normalMap = getTexture( json.normalMap );
		if ( json.normalMapType !== undefined ) material.normalMapType = json.normalMapType;
		if ( json.normalScale !== undefined ) {

			let normalScale = json.normalScale;

			if ( Array.isArray( normalScale ) === false ) {

				// Blender exporter used to export a scalar. See #7459

				normalScale = [ normalScale, normalScale ];

			}

			material.normalScale = new Vector2().fromArray( normalScale );

		}

		if ( json.displacementMap !== undefined ) material.displacementMap = getTexture( json.displacementMap );
		if ( json.displacementScale !== undefined ) material.displacementScale = json.displacementScale;
		if ( json.displacementBias !== undefined ) material.displacementBias = json.displacementBias;

		if ( json.roughnessMap !== undefined ) material.roughnessMap = getTexture( json.roughnessMap );
		if ( json.metalnessMap !== undefined ) material.metalnessMap = getTexture( json.metalnessMap );

		if ( json.emissiveMap !== undefined ) material.emissiveMap = getTexture( json.emissiveMap );
		if ( json.emissiveIntensity !== undefined ) material.emissiveIntensity = json.emissiveIntensity;

		if ( json.specularMap !== undefined ) material.specularMap = getTexture( json.specularMap );
		if ( json.specularIntensityMap !== undefined ) material.specularIntensityMap = getTexture( json.specularIntensityMap );
		if ( json.specularColorMap !== undefined ) material.specularColorMap = getTexture( json.specularColorMap );

		if ( json.envMap !== undefined ) material.envMap = getTexture( json.envMap );
		if ( json.envMapRotation !== undefined ) material.envMapRotation.fromArray( json.envMapRotation );
		if ( json.envMapIntensity !== undefined ) material.envMapIntensity = json.envMapIntensity;

		if ( json.reflectivity !== undefined ) material.reflectivity = json.reflectivity;
		if ( json.refractionRatio !== undefined ) material.refractionRatio = json.refractionRatio;

		if ( json.lightMap !== undefined ) material.lightMap = getTexture( json.lightMap );
		if ( json.lightMapIntensity !== undefined ) material.lightMapIntensity = json.lightMapIntensity;

		if ( json.aoMap !== undefined ) material.aoMap = getTexture( json.aoMap );
		if ( json.aoMapIntensity !== undefined ) material.aoMapIntensity = json.aoMapIntensity;

		if ( json.gradientMap !== undefined ) material.gradientMap = getTexture( json.gradientMap );

		if ( json.clearcoatMap !== undefined ) material.clearcoatMap = getTexture( json.clearcoatMap );
		if ( json.clearcoatRoughnessMap !== undefined ) material.clearcoatRoughnessMap = getTexture( json.clearcoatRoughnessMap );
		if ( json.clearcoatNormalMap !== undefined ) material.clearcoatNormalMap = getTexture( json.clearcoatNormalMap );
		if ( json.clearcoatNormalScale !== undefined ) material.clearcoatNormalScale = new Vector2().fromArray( json.clearcoatNormalScale );

		if ( json.iridescenceMap !== undefined ) material.iridescenceMap = getTexture( json.iridescenceMap );
		if ( json.iridescenceThicknessMap !== undefined ) material.iridescenceThicknessMap = getTexture( json.iridescenceThicknessMap );

		if ( json.transmissionMap !== undefined ) material.transmissionMap = getTexture( json.transmissionMap );
		if ( json.thicknessMap !== undefined ) material.thicknessMap = getTexture( json.thicknessMap );

		if ( json.anisotropyMap !== undefined ) material.anisotropyMap = getTexture( json.anisotropyMap );

		if ( json.sheenColorMap !== undefined ) material.sheenColorMap = getTexture( json.sheenColorMap );
		if ( json.sheenRoughnessMap !== undefined ) material.sheenRoughnessMap = getTexture( json.sheenRoughnessMap );

		return material;

	}
Parses the given JSON object and returns a material.

@param {Object} json - The serialized material.
@return {Material} The parsed material.