This is the mod for Vampire: The Masquerade - Bloodlines that makes the game and lore a bit more glittery and sparkly.
Here Vampiric predators that rule the day, the night and twilight hours prey on people, but vampires has a way that can be easely dicernible from normal people is that their skin sparkle like a million diamonds on sunlight. Vampire hunters and other slayers use this fact to the vampires disavantage and always patrol at day, always vigilant for vampires sightings. That's the real reason why vampires rarely go out at daytime.
The mod is featured at http://www.moddb.com/mods/vampire-bloodlines-sparkle-edition
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