Optical products, masters for fabricating optical products, and methods for manufacturing masters and optical products

An optical product comprising:

• an array of lenses, prisms, or mirrors;
• a first plurality of portions disposed under the array of lenses, prisms, or mirrors, individual ones of the first plurality of portions corresponding to a point on a surface of a first 3D object, and comprising first non-holographic features configured to produce at least part of a first 3D image of the first 3D object;
• and
• a second plurality of portions disposed under the array of lenses, prisms, or mirrors, individual ones of the second plurality of portions corresponding to a point on a surface of a second 3D object, and comprising second non-holographic features configured to produce at least part of a second 3D image of the second 3D object,
• wherein at a first viewing angle, the array of lenses, prisms, or mirrors presents the first 3D image for viewing without presenting the second 3D image for viewing, and at a second viewing angle different from the first viewing angle, the array of lenses, prisms, or mirrors presents for viewing the second 3D image without presenting the first 3D image for viewing,
• wherein a gradient in said first non-holographic features correlates to an inclination of said surface of said first 3D object at said corresponding point, and
• wherein an orientation of said first non-holographic features correlates to an orientation of said surface of said first 3D object at said corresponding point.