I've encountered a visual anomaly with a model I imported using JSONLoader.
It's difficult to describe, you'll have to see it for yourself.
It seems to be related to the different materials and the camera's point of view.
You can access the plunk here:
http://plnkr.co/edit/0VjHiGNmWFHxdoMWC3GV?p=info
Part of the code involving JSONLoader:
var loader = new THREE.JSONLoader();
loader.load( 'tv.js',
function ( geometry, materials ) {
var tv = new THREE.Mesh( geometry, new THREE.MeshFaceMaterial(materials) );
glScene.add(tv);
} );