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Ingenious special effects and high-tech spectacles are becoming de rigeur in theatrical productions, but are they worth the expense?

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A rehearsal from the New York Metropolitan Opera production of Wagner's Das Rheingold. The set was designed by Canadian Robert LePage.

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From Nineteen Eight-Four: Alex Lazaridis Ferguson, being restrained, taunted by Joel Ballard.

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Owen Sharpe (Pippin) and Dylan Roberts (Merry) encounter the Ents of Fangorn in a scene from the World Premiere production of The Lord of the Rings. Toronto, 2006.

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Lord of the Rings cast member Joe Eigo practices his moves during dress rehearsal in Toronto, Friday October 28, 2005.Aaron Harris

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An image from the original London production of The Railway Children.

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A rehearsal image from the Metropolitan Opera production of Wagner's Das Rheingold in New York. The stage and settings were designed by Robert LePage.

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A production image from the New York Metropolitan Opera's staging of Wagner's Das Rheingold. The set was created by director Robert LePage .

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