Proscenium arches, apron stages, theatre in the round and back projections have all added to the magic. Now, for the generation brought up on computer graphics and cinematic special effects, comes Bogglevision — live 3D illusions that allow virtual objects to float in space and interact live with anything that happens in the auditorium.

The live 3D is being tried out for the first time this week by the Birmingham Stage Company, whose patrons are Sir Derek Jacobi and Paul Scofield.

Historical figures and events are to be brought to life in stagings for children based on the Horrible History books by Terry Deary. Audiences will see portraits of Henry VIII and Elizabeth I hover above their heads and find themselves dodging cannon-balls and pieces of wood when a ship of the Spanish Armada is struck.

The objects come right at the audience, fooling the brain into believing they are real. At the trial in Darlington last week children were excitedly reaching out to grab them.

Until now 3D technology used in the theatre has been pre-recorded so that the excitement of live performance was lost. Neal Foster, 39, actormanager of The Birmingham Stage Company, said that 3D shows by Universal Studios and Disney were thrilling, but that every show was identical. ”You feel slightly manipulated from that point of view,” he said. “It’s the same show for everyone.”

Bogglevision, which has been registered for a patent, allows the technology to adapt to whatever happens on the night. “It dissolves the boundaries between the stage and the audience,” says Foster. “As a theatre person, the live element is crucial to me. Live theatre should be live.”

In Horrible Histories, as characters on stage search for a missing book, a member of the audience is asked their name and sees it appear instantly in a 3D book that suddenly floats, dancing in space, in front of them. For a child, in particular, that is a magical moment.

Foster was initially sceptical about the idea but was convinced by a demonstration by Amazing Interactives, the company that has developed it.

When cannons started firing in rehearsals for the production, even though he knew they were not real, he found himself ducking. “It’s impossible not to duck when a giant canon-ball heads towards your head,” he said. “I couldn’t help but flinch.”

Tim Dear of Amazing Interactives, which has until now specialised in special effects for visitor attractions, said: “Stereo vision is used by Disney, but it’s never live. It’s never been done before. All the software we’ve developed for this production will run live.”

The technology, run through a laptop computer, allows up to 60 set changes. Members of the audience wear special polarised glasses, which resemble ordinary spectacles rather than the red and green cardboard ones that proved such a failure in 3D cinema.

The technology will be made available to other companies, although particular care will be taken to ensure it does not become something ordinary by being used too widely.

Foster believes that the new technology could transform theatre productions worldwide. The reason too many people stay away, he believes, is that 80 per cent of the productions offered at the moment are disappointing.

”If I had my way,” he said, “I would make it a criminal offence to bore an audience.”

Horrible Histories — which are staging The Terrible Tudors and The Vile Victorians based on some of the most popular non-fiction books in children’s libraries — will receive a national tour, visiting the New Theatre in Cardiff and The Lowry in Salford among seven venues.

DUCK! HERE COMES A 3D TURKEY

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