Hard-light hologram

A hard-light hologram was a hologram which was solid.

Phayke was a planet inhabited by hard-light holograms. (COMIC: Spam Filtered)

Hard-light holograms were used on the Orient Express to deceive passengers into believing the train was normal, creating hologram furniture and people. (TV: Mummy on the Orient Express)

Strax's fighting drone was an example of a hard-light hologram. In 1894, Strax tinkered with the drone causing it to malfunction and begin roaming Paternoster Row. Most of the residents thought that they were being hunted by a Ghost and blamed Madame Vestra for it. (PROSE: The Spectre of Paternoster Row)