有意思的“不可见（invisible）”的特效包括建造“虚拟背景（virtual backgrounds）”：关于真实环境的照片在精心计算的位置上被拍摄下来。
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virtual photo-realistic backgrounds 虚拟照片真实场景
Instead of fibbing awkwardly about their jobs, backgrounds or marital status, the players create virtual alter egos, which are transformed into colourful avatars to represent themselves in the online world.
ECONOMIST: Computer games
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