code: function () {
  		var defaultMaterial = new THREE.MeshStandardMaterial( { color: 0xDCF1FF } );
  		defaultMaterial.name = 'defaultMaterial';
  
  		var defaultVertexColorMaterial = new THREE.MeshStandardMaterial( { color: 0xDCF1FF } );
  		defaultVertexColorMaterial.name = 'defaultVertexColorMaterial';
  		defaultVertexColorMaterial.vertexColors = THREE.VertexColors;
  
  		var defaultLineMaterial = new THREE.LineBasicMaterial();
  		defaultLineMaterial.name = 'defaultLineMaterial';
  
  		var defaultPointMaterial = new THREE.PointsMaterial( { size: 1 } );
  		defaultPointMaterial.name = 'defaultPointMaterial';
  
  		var runtimeMaterials = {};
  		runtimeMaterials[ defaultMaterial.name ] = defaultMaterial;
  		runtimeMaterials[ defaultVertexColorMaterial.name ] = defaultVertexColorMaterial;
  		runtimeMaterials[ defaultLineMaterial.name ] = defaultLineMaterial;
  		runtimeMaterials[ defaultPointMaterial.name ] = defaultPointMaterial;
  
  		this.updateMaterials(
  			{
  				cmd: 'materialData',
  				materials: {
  					materialCloneInstructions: null,
  					serializedMaterials: null,
  					runtimeMaterials: runtimeMaterials
  				}
  			}
  		);
  	}
docs: Initializes the MeshBuilder (currently only default material initialisation).