altspace.utilities.shims.OBJMTLLoader does not propagate the crossOrigin property to MTLLoader and OBJLoader. See below for proposed fix:
var OBJMTLLoader = (function () {
value: function load(objFile, mtlFile, callback) {
var mtlLoader = new THREE.MTLLoader();
>>> mtlLoader.setCrossOrigin(this.crossOrigin); <<<
altspace.utilities.shims.OBJMTLLoader does not propagate the crossOrigin property to MTLLoader and OBJLoader. See below for proposed fix: