I thought it might be a resizing window issue, for which I wrote a JS function, but that didn't seem to be the case. Any suggestions?
/if the user resizes the window, the camera and renderer are updated
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);
}
onWindowResize();
window.addEventListener('resize', onWindowResize);