 Each point is created by a laser beam focused to high intensity at that location by a computer-controlled opto-mechanical system.A complex or highly detailed image occupying a 5 cm (2 inch) cubic volume typically requires the creation of tens of thousands of such points.Bubblegram images may be created by intersecting laser beams in appropriately doped plastic to induce a chemical reaction via heat or photonic excitation, creating bubbles or nodes where the plastic has a different index of refraction.