A system is provided that integrates an autonomous energy harvesting capacity in buildings in an aesthetically neutral manner. A unique set of structural features combine to implement a hidden energy harvesting system on a surface of the building to provide electrical power to the building, and/or to electrically-powered devices in the building. Color-matched, image-matched and/or texture-matched optical layers are formed over energy harvesting components, including photovoltaic energy collecting components. Optical layers are tuned to scatter selectable wavelengths of electromagnetic energy back in an incident direction while allowing remaining wavelengths of electromagnetic energy to pass through the layers to the energy collecting components below. The layers uniquely implement optical light scattering techniques to make the layers appear opaque when observed from a light incident side, while allowing at least 50%, and as much as 80+%, of the energy impinging on the energy or incident side to pass through the layer.