Abstract: A system for an entertainment venue includes an enclosure comprising a display surface, a light emitter disposed within the enclosure and configured to output a light, and a tube disposed within the enclosure. The tube is configured to receive the light and transmit the light through the display surface of the enclosure to form imagery.

Abstract: A method for detecting a source of ignition in a zone of a reactor vessel involving the optical measurement of the progress of a flame front generated by the ignition. The ignition is sensed and the time thereof measured and recorded. A photosensor senses the entry of the flame front into its view aperture and the time thereof is measured. The time of the ignition is compared to the time of the flame front's entry into the photosensor's view aperture. Further, an apparatus for determining the location of ignition of combustion in a reactor zone having a means for detecting the ignition and a plurality of photosensors for characterizing the accompanying flame front's progression. Also, a photosensor assembly for use in connection with the method and apparatus.