Audience risers may be configured to hold convention seating, theater seating, classroom table seating or dinner table seating. Although primarily rectangular in overall shape, audience risers may include angled or curved sections as space allows. The lighting and configuration must match. For a "lecture-performance", any "light is equally distributed in the audience risers and the stage." In
lighting design, one must remember to work around any visual obstructions. One drama textbook recommends against a gap before traditional theater risers, which is similar to a 'classroom riser': "The optimal performance space for real-time acting is a
flat or level-floor theater, one in which the audience risers begin on the same level as the acting space, permitting no separation between actor and audience."(
italics in original) File:Audience riser.jpg|Audience Riser File:Seating Riser.jpg|Traditional Theater Riser Image:DinnerRiser.jpg|Dinner Riser File:Classroom riser.jpg|Classroom Riser, also known as a flat or level-floor riser ==Construction==