Hologram (Fallout: New Vegas)

Holograms are 3-dimensional projections which sometimes interact with players and NPCs in Sierra Madre in 2281.

Hologram
This version of the hologram is the main security version. They appear in the Villa Clinic and in the Sierra Madre Casino (hotel). It appears to be wearing Sierra Madre security armor. The emergency defense system activated these holograms when the bombs dropped, and they are still actively patrolling. It best to avoid being seen by these holograms, or to find their emitters and disable them. The security holograms can disguise themselves as other holograms so watch out.

Starlet hologram
The starlet holograms all have the appearance of Vera Keyes. Unlike security holograms, Vera Keyes holograms don't always attack the player, the exceptions being the hologram in Vera's room, and the Executive Suites. Outside the Sierra Madre Casino there's an additional starlet hologram, featured very prominently, in the central non-functioning Villa fountain.

Hologram vendor
Throughout the Sierra Madre there are several vendors from which to buy various items, such as food and drinks. Vendor locations include the casino, and the cafe. This type of hologram will ignore attacks, and will not turn hostile towards the player character.

Dean hologram
Dean hologram is a stage-performing hologram found in The Tampico theater at the Sierra Madre Casino. During the quest Curtain Call at the Tampico, the hologram of Dean Domino will perform the song "Something's Gotta Give", on the Tampico stage. After the song, he will receive some applause from hologram spectators, and subsequently disappear from the stage.