It is usually, though not always, generated by the system's graphics chip.
Often, the graphics chips used in home computers and video game consoles had limited capabilities.
Special graphics chips also make the images on the television screen even sharper than one might expect, creating something close to a three-dimensional effect.
The best: Nvidia, a maker of graphics chips whose shares doubled this year.
R300 was the first fully Direct3D 9-capable consumer graphics chip.
The first to feature a graphics chip, it also had above average video and camera capabilities.
The graphics chip that couldn't handle Vista's whizzy special effects.
Xbox is expected to have the most advanced graphics chip of any game console.
Since most of the time the graphics chip is idle, this results in a performance improvement overall.
By the end of 2001, all discrete graphics chips would have hardware T&L.