Fulldome refers to immersive dome-based video projection environments. The dome, horizontal or tilted, is filled with real-time (interactive) or pre-rendered (linear) computer animations, live capture images, or composited environments.
Although the current technology emerged in the early-to-mid 1990s, fulldome environments have evolved from numerous influences, including immersive art and storytelling, with technological roots in domed architecture, planetariums, multi-projector film environments, flight simulation, and virtual reality.
Initial approaches to moving fulldome imagery used wide-angle lenses, both 35 and 70 mm film, but the expense and ungainly nature of the film medium prevented much progress; furthermore, film formats such as Omnimax did not cover the full two pi steradians of the dome surface, leaving a section of the dome blank (though, due to seating arrangements, that part of the dome was not seen by most viewers). Later approaches to fulldome utilized monochromatic vector graphics systems projected through a fisheye lens. Contemporary configurations employ raster video projectors, either singly or grouped together to cover the dome surface with full-color images and animations.
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Fulldome video projection can use a variety of technologies in two typical formats: single- and multiple-projector systems. The individual projector(s) can be driven by a variety of video sources, typically feeding material rendered in either real-time or “pre-rendered” modes. The end result is a video image that covers an entire domed projection surface, yielding an immersive experience that fills a viewer’s field of view.
Single-projector fulldome video systems use a single (or mixed) video source displayed through a single fisheye lens, typically located at or near the center of a hemispherical projection surface. A single projector has the benefit of avoiding edge blends (see below) between multiple projectors. A disadvantage of central projectors is the loss of the center of the dome for optimal viewing of the reconstructed perspective view provided by true hemispheric projection, a problem shared with traditional planetarium projectors. High quality hemispheric projection lenses like the Navitar HemiStar Dome lenses operate at the practical limits of optical performance needed for high resolution full dome coverage. Single-projector mirror systems, invented by Paul Bourke but now offered by Discovery Dome and other manufacturers, is placed on the edge of the dome to increase seating, decrease costs, and to allow analog planetariums to become digital without giving up their star projector.
Multiple-projector fulldome video systems rely on two or more video projectors edge-blended to create a seamless image that covers a hemispherical projection surface; splitting the entire image up into segments allows for higher-resolution imagery and projector placement that does not intrude on the viewing area underneath the dome. A disadvantage of multiple projection is the need to frequently adjust the alignment of projectors and the uneven aging of separate projectors leading to brightness differences between segments. Even minor performance differences between projectors can be obvious when projecting a solid color across the entire scene.
A wide variety of video projection technologies has been employed in domes, including cathode ray tube (CRT), Digital Light Processing (DLP), liquid crystal display (LCD), liquid crystal on silicon (LCOS), and most recently, two varieties of laser projectors (see the laser video projector).
For multi-projector systems in particular, display devices must have a low black level (i.e., project little or no light when no signal is sent to them) to allow for reasonable edge-blending between the different projector footprints. Otherwise, overlapping video images will have an additive effect, causing a complex pattern of grey to appear even when no image is being projected. This becomes particularly important for users in the planetarium field, who have a vested interest in projecting a dark night sky. The desire for projectors to “go to black” has resulted in continued use of CRT technology, even as newer and less expensive technologies have emerged.
LCD projectors have fundamental limits on their ability to project true black as well as light, which has tended to limit their use in planetariums. LCOS and modified LCOS projectors have improved on LCD contrast ratios while also eliminating the “screen door” effect of small gaps between LCD pixels. “Dark chip” DLP projectors improve on the standard DLP design and can offer relatively inexpensive solution with bright images, but the black level requires physical baffling of the projectors. As the technology matures and reduces in price, laser projection looks promising for dome projection as it offers bright images, large dynamic range and a very wide color space.
DOME lenses and standard lens are similar in some ways. They both depend on the type of display device, LCD, DLP, LCOS, DILA and the size chip or panel that is part of this device. The unique feature of the DOME lens is the actual shape of the glass, the projected image spill out from the top and all around circumference of the lens. The biggest advantage is how this type of lens maintains focus over the full 180 x 180 field of view. A single standard flat field or curved field lens would have major focus and distortion issue. Several lens developers offer DOME lenses with each designed to a specific projector class and display device. These lenses can cover a variety of pixel sizes and display resolutions.
| 1983 | First Evans & Sutherland Digistar I calligraphic scan (projection of light points and lines - also known as vector scan) planetarium projector at the Science Museum of Virginia in Richmond, Virginia, U.S.A. |
| 1992 | First dome-based vector/calligraphic scan scientific visualization system at SIGGRAPH, installed by the North Carolina Supercomputing Center using a reprogrammed Digistar I for molecular visualization |
| 1994 | Alternate Realities Corporation premieres their first VisionDome prototype at Glaxo Inc. in Research Triangle Park, North Carolina, U.S.A. Developed at the North Carolina Supercomputing Center, the VisionDome uses a raster scan projector (full color video) and fisheye lens to project interactive 3D graphics onto a 5 meter dome.[1] |
| 1995 | First Evans & Sutherland Digistar II calligraphic scan planetarium projector opens at the London Planetarium, UK |
| British Telecom uses a vertical five-meter Alternate Realities Corporation VisionDome for its “Shared Spaces” media environment research programme, incorporating computer graphics, virtual landscapes, data graphics, video, composited live action. and spatialized sound.[2] | |
| August: Full-day SIGGRAPH '95 course entitled "Graphics Design and Production for Hemispheric Projection" introduces spherical perspective, hemispheric projection, and suggests a convergence of simulation systems employing edge-blended raster video projection, virtual reality systems such as the CAVE (Cave Automatic Virtual Environment), and planetarium theaters to create a new medium with an enhanced illusion of presence. Organized by Ed Lantz with presenters Mike Hutton, Steven Savage and Chris Ward. | |
| 1996 | July 13–19: First Goto Virtuarium demonstrated at the International Planetarium Society Conference in Osaka, Japan |
| October 26–29: Evans & Sutherland StarRider demonstrated at Association of Science-Technology Centers conference in Pittsburgh, Pennsylvania, U.S.A. | |
| 1997 | April: First permanent installation of Spitz ElectricSky at Northern Lights Center in Yukon Territory, Canada using three Electrohome 9500 CRT projectors, line-quadrupled video playback, and real-time edge-blends for 200x60-degree field-of-view virtual desktop. |
| May 7–10: Spitz ElectricSky publicly unveiled at MAPS conference in Chadds Ford, PA. | |
| 1998 | May 22 - September 30: The Oceania pavilion opens at the EXPO 98 in Lisbon, Portugal. Among numerous virtual reality exhibits, it includes The Artefact Room, a 7-metre dome VisionDome theater with interactive 3D animations of a fly-through of Atlantis that are controlled by 40 participants simultaneously.[3] |
| June 28 - July 2: Sky-Skan premieres SkyVision at the International Planetarium Society Conference in London, UK. First astronomical digital fulldome animation shown to audiences there, “Pillars of Creation” by Don Davis, as well as a Space Station animation by Home Run Pictures. This marks the first public demonstration of fulldome video, distinguished by playback of actual video—as opposed to previous efforts based on proprietary image generators using vector or raster graphics—covering a full hemisphere. | |
| December: Vertical dome installation by SGI and Trimension at University of Teesside, UK.[4]
December: Houston Museum of Natural Science opens SkyVision system as a permanent public theater, with seed funding from NASA in partnership with Rice University. First playback fulldome show: "Cosmic Mysteries". [5] |
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| 1999 | Adler Planetarium reopens in Chicago, Illinois, U.S.A., with an Evans & Sutherland StarRider system |
| Evans & Sutherland premiers their first linear playback show "We Take You There" at SIGGRAPH '99
Carnegie Museum of Natural history opens the Earth Theater with a SkyVision system |
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| 2000 | Hayden Planetarium reopens at the American Museum of Natural History in New York, New York, U.S.A., with a Silicon Graphics Onyx2 and Trimension video system |
| 2002 | BMW Group EarthLounge Premiere of the ADLIP (All-Dome Laser Image Projection) System from Carl Zeiss with SkyVision Full Dome Video System and DigitalSky from Sky-Skan and fulldome film by LivinGlobe (ag4, Exponent3) in the world's largest fulldome projection dome (24m) at the UN World Summit on Sustainable Development, Johannesburg South Africa. |
| 2003 | Clark Planetarium (formerly Hansen Planetarium) reopens in Salt Lake City, Utah, U.S.A., with an Evans & Sutherland Digistar 3 |
| Adler Planetarium upgrades their StarRider to the new Evans & Sutherland Digistar 3 system. The mini-dome also opens in their production department running both the Digistar 3 SP and Producer systems. | |
| The first digital planetarium systems designed for the portable market are introduced independently by Digitalis Education Solutions and Sky-Skan (in partnership with Rice University and the Houston Museum of Natural Science). HMNS/Rice version subsequently diverges to become Discovery Dome. | |
| July 27–28: First industry-wide showcase of fulldome programming at SIGGRAPH in the Reuben H. Fleet Science Center including full-day course on fulldome art and science entitled "Computer Graphics for Large-Scale Immersive Theaters." | |
| November 3: The Eugenides Planetarium of Athens, Greece, re-opens premiering its first 40 minute production "Cosmic Odyssey" with both a fulldome Sky Skan Skyvision-Digital Sky system and an Evans & Sutherland Digistar 3 system under a 24,5 meter Astrotec dome. | |
| 2004 | First DomeFest held at the LodeStar Astronomy Center in Albuquerque, New Mexico, U.S.A. |
| First ASTC Fulldome Showcase held at Tech Museum of Innovation, San Jose, CA | |
| First Immersive Cinema movie R+J(Romeo and Juliet) by LivinGlobe | |
| December: Beijing Planetarium New Building opens in Beijing, China, with a Silicon Graphics Onyx 300 and the first fulldome laser display (Zeiss ADLIP) | |
| 2005 | GOTO installs the first complete fulldome sphere at EXPO 2005 in Aichi, Japan |
| 2007 | October: Obscura Digital and The Elumenati develop a temporary 90' diameter geodesic fulldome experience for Google's Zeitgeist event on the Google campus |
| 2008 | July: Sky-Skan demonstrates Definiti 8K: a 60,000 lumen, 8k x 8k fulldome projection system at IPS 2008 at Adler Planetarium in Chicago rivaling image quality of large-format film (system subsequently opens at Beijing Planetarium) |
| 2009 | March: University of Colorado Denver College of Arts and Media (CAM) set up a 25 Mac Octo-core Cinema 4D and After Effects Render Farm to specifically process full dome content alongside Denver Museum of Nature Science and IMERSA |
| 2010 | November: Institute of American Indian Arts opens the worlds first fully articulating digital dome. |
| 2011 | January: University of Washington Planetarium opens first 6 channel HD full dome digital projection conversion based entirely on Microsoft Research WorldWide Telescope. Done on a hardware and construction budget of 40,000 USD the planetarium features the world's largest all-sky panorama at 1 terapixel, allowing zooming to 1 arc-second per pixel anywhere in the sky. UW graduate student Philip Rosenfield presented a paper at the Astronomical Society of the Pacific 2010 Cosmos and EPO symposia describing the design and construction of the system. |