​

function setup() {

  createCanvas(400, 400, WEBGL);

  camDefault = createCamera();

  cam3D = createCamera();

}

​

function draw() {

  setCamera( cam3D );

  background(220);

  orbitControl();

  box( 200 );

  // overlay

  clearDepth();

  setCamera( camDefault );

  circle( -100, -100, 50 );

}

​

​