Editing XScreenSaver (section)

== Display modes ==
The included hacks are highly varied, ranging from simple 2D [[Psychedelic art|psychedelia]], to 3D demonstrations of complex mathematical principles, to simulations of other computer systems, to re-creations of artifacts and effects from movies.

Though many of the newer hacks take full advantage of the power of modern computers, the age of the project means that some of the older hacks may look dated to modern eyes, as they were originally written for much less powerful computers.

Examples of hacks include:{{r|screenshots}}

*''Atlantis'' &ndash; an [[OpenGL]] animation showing whales and dolphins.
*''BSOD'' &ndash; shows fake fatal [[screen of death]] variants from many computer systems, including [[Microsoft Windows]] [[Blue Screen of Death]], a Linux [[kernel panic]], a [[Darwin (operating system)|Darwin]] crash, an [[Amiga]] "[[Guru Meditation]]" error, a [[sad Mac]], and more.
*''Apple2'' &ndash; simulates an [[Apple II]] computer, showing a user entering a simple [[BASIC]] program and running it. When run from the command-line, it is a fully functional [[terminal emulator]] (as is ''Phosphor''.)
*''Barcode'' &ndash; a number of coloured [[barcode]]s scroll across the screen.
*''Flow'' &ndash; a 3D display of [[strange attractor]]s.
*''Flying toasters'' &ndash; 3D toasters fly around, inspired by the classic [[After Dark (software)|After Dark]] screensaver.
*''Gears'' &ndash; an OpenGL animation of inter-meshing [[gear]]s and [[planetary gear]]s.
*''GLMatrix'' &ndash; an OpenGL animation similar to the "[[Matrix digital rain|digital rain]]" title sequence seen in the [[Matrix trilogy]].
*''Molecule'' &ndash; an OpenGL animation showing [[space-filling model|space-filling]] or [[ball-and-stick model|ball-and-stick]] models of a series of common drugs and other molecules, of which thirty-eight (38) are built in. It can also read [[Protein Data Bank|PDB (Protein Data Bank)]] from a file, or files placed in a directory, as input.
*''Penrose'' &ndash; tiles the screen aperiodically with coloured [[Penrose tile]]s.
*''Spotlight'' &ndash; puts a moving spotlight across the desktop in the style of the [[James Bond]] film opening sequences.
*''Sproingies'' &ndash; an animation in the style of the video game ''[[Q*bert]]''.
*''Webcollage'' &ndash; creates collages out of random images found on the Web.
*''XAnalogTV'' &ndash; simulates an analog [[cathode-ray tube]] television set, including visual artifacts and reception issues.
*''XPlanet'' &ndash; draws [[planet]]s and other celestial bodies that update in real time.
*''XMatrix'' &ndash; animations similar to the "[[Matrix digital rain|digital rain]]" sequence seen in the [[Matrix trilogy]].

Some of the included hacks are very similar to [[demo effect]]s created by the [[demoscene]]:
* ''Boing'' &ndash; based on the 1984 program regarded as the first [[Amiga demo]] ever, showing the bouncing red and white ball.
* ''Bumps'' &ndash; an implementation of full-screen 2D [[bump mapping]].
* ''[[Metaballs]]'' &ndash; another common demo effect.
* ''Moire2'' &ndash; moving [[moiré pattern|interference circles]] similar to those common in older Amiga demos.
* ''ShadeBobs'' &ndash; another effect common in older Amiga demos.
* ''XFlame'' &ndash; the filter-based fire effect, also known as flame effect.