Solid Vision

Solid Vision are interactive holographic projections. Seto Kaiba used this phenomenon to create holographic monsters in order to recreate the Experience of Death Penalty Game and enhance games, including Duel Monsters and Capsule Monster Chess.

Usage
In the manga, Kaiba created Battle Boxes which used Solid Vision to enhance Duel Monsters and made a deal with Industrial Illusions to produce them.

During Death-T, Kaiba used Battle Boxes, to create holograms of the monsters Summoned in Duel Monsters and Capsule Monster Chess. Whoever lost a game, would be subject to the Illusion of Death by virtual reality. He tested the Penalty Game on human subjects, finding that the average person went insane after ten minutes of the torture.

Battle Boxes were used for the Duelist Kingdom tournament.

In the anime, Dueling Arenas were used instead of Battle Boxes and Death-T did not happen.

To combat Pegasus' mind reading, Kaiba used Solid Vision to create Duel Disks to play Duel Monsters with. These have been primarily used to play Duel Monsters in the series ever since.

In Yu-Gi-Oh! 5D's, Solid Vision is also used to play Duel Monsters on Duel Runners.