Abstract: Methods and apparatus for providing a building block having a number of light transmitting fibers embedded into building materials, such as concrete. The light transmitting fibers have an output end and an input end, where the output ends of the light transmitting fibers are arranged in a display pixel pattern on at least one surface of the building block, and where the input fibers are arranged in an input pixel pattern at an input surface of the building block. A method of manufacturing a building block for the display system is also disclosed.