I am working with the code snippet provided below. The issue I am currently facing is that one side of the partial sphere is non-transparent, while the other side remains transparent. How should I modify the code to make both sides non-transparent? Thank you for your help.
let sphere_geometry = new THREE.SphereGeometry(15, 32, 32, Math.PI + Math.PI/2, Math.PI/2, 0, Math.PI/2);
let sphere_material = new THREE.MeshLambertMaterial({ color: 0xFFFF00 });
let sphere = new THREE.Mesh(sphere_geometry, sphere_material);