Instanced Buffer Attribute Not Working

Questions
1

I might be doing something silly, but could anyone point out why are these cubes colored white sandbox code? They should be a random color.

2

Change this:

const material = new THREE.MeshBasicMaterial();

to this:

const material = new THREE.ShaderMaterial({
  vertexShader,
  fragmentShader
});

and you’ll get this:

изображение
изображение893×860 2.13 KB

3

Would you happen to know why same example doesn’t work now after modifications. I made separate question for this if you are interested.