Hello so I am trying to figure out how to add an MTL file to my OBJ in three.js. I had my OBJ loaded and was coming back to fix this issue. Now when I added the code for the MTL file to be loaded using MTLLoader it is not getting passed mtlLoader.load(url, ....) (as in after adding this bit of code now only the scene is being rendered with nothing inside of it). I am using alerts to track the progress of the code and am getting alerts from before this statement but not after. All of the solutions I have found include using OBJMTLLoader which is no longer part of the current version of three.js (r74).