Three-dimensional structures and related methods of forming three-dimensional structures

A three-dimensional structure for a housing of an electronic device, the three-dimensional structure comprising:

• a unitary body comprising:
• a first surface comprising a first pattern of a positive space defined by a first non-random pattern of a negative space that extends into the body a first defined depth in accordance with a first axis, and
• a second surface at a different position on the body from the first surface and comprising a second pattern of a positive space defined by a second non-random pattern of a negative space that extends into the body a second depth and in accordance with a second axis, wherein at least some of the first non-random pattern of negative space and the second non-random pattern of negative space overlap with each other forming apertures that extend through the unitary body having a size and a shape in accordance with an amount of overlap, wherein the first and second positive spaces combine to form a positive surface of the three dimensional structure.