Source: Street Magic, page 180
The adept with this power may move over surfaces — including soft or brittle surfaces such as snow, sand, or thin paper — without leaving visible traces. He makes no noise through contact with the floor (though movement may still cause other sounds), and any hearing-based Perception Tests to detect him suffer a –4 dice pool penalty. The adept will not trip ground-based motion or pressure sensors. The adept cannot walk across liquid surfaces (but can walk across deep snow without sinking) and can still be tracked by non-visual cues such as scent and sound.