three.js box geometry opacity - three.js

Question

Friends, I use three.js basic material and created 2 box, I don't want to see the small box inside the bigger box, but I can see all of them now. could you help me?
var cube1 = new THREE.Mesh(
new THREE.BoxGeometry(200, 200, 200),
new THREE.MeshBasicMaterial({
color: 0xffffff,
transparent: false,
opacity: 1,
overdraw: 0.5
}));
scene.add(cube1);
var cube2 = new THREE.Mesh(
new THREE.BoxGeometry(100, 100, 100),
new THREE.MeshBasicMaterial({
color: 0x000000,
transparent: false,
opacity: 1,
overdraw: 0.5
}));
scene.add(cube2);

Answer 1

Ideally this should not happen maybe you might have missed something, I here is the complete code in the snippet of what you are trying to achieve.
var camera, scene, renderer;
var mesh;
init();
animate();
function init() {
renderer = new THREE.WebGLRenderer();
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.setClearColor(0xAAAAAA);
renderer.sortObjects = true;
document.body.appendChild(renderer.domElement);
//
camera = new THREE.PerspectiveCamera(70, window.innerWidth / window.innerHeight, 1, 1000);
camera.position.z = 400;
scene = new THREE.Scene();
cube1 = new THREE.Mesh(
new THREE.BoxGeometry(200, 200, 200),
new THREE.MeshBasicMaterial({
color: 0xffffff,
transparent: false,
opacity: 1,
overdraw: 0.5
}));
scene.add(cube1);
//
cube2 = new THREE.Mesh(
new THREE.BoxGeometry(100, 100, 100),
new THREE.MeshBasicMaterial({
color: 0x000000,
transparent: false,
opacity: 1,
overdraw: 0.5
}));
scene.add(cube2);
window.addEventListener('resize', onWindowResize, false);
}
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);
}
function animate() {
requestAnimationFrame(animate);
cube1.rotation.x += 0.005;
cube1.rotation.y += 0.01;
cube2.rotation.x += 0.010;
cube2.rotation.y += 0.01;
renderer.render(scene, camera);
}
html, body {
padding:0px;
margin:0px;
}
canvas {
width: 100%;
height: 100%
}
<script src="http://cdnjs.cloudflare.com/ajax/libs/three.js/r69/three.min.js"></script>
I have also created a jsfiddle link if you prefer.Hoping it solves your problem,else you can edit the snippet to reproduce your problem.

Answer 2

find the reason:
see through example
if I put the cube position.z < 0, I'll 'see through'.
but if you want to see through, this is a tricky.
[http://jsfiddle.net/agpcn1ej/1/][1]
seems find the answer.
that's because part of the house model position.z < 0, and camera's near < 0, maybe three.js z-buffer clear negative = 0, z-buffer determines the sheltery relation.