Forrester says that virtual worlds are ripe for use by business, but the way that vendors have presented themselves has been off the mark.
Forrester认为虚拟世界已经为商业用途做好了准备，但是厂家的做事方法却不妥。
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Fortunately, when we film a scene with a virtual character, the team always puts a guide mark in front of us. Thus we're not playing completely in the emptiness.
A wireless communications device with positioning capabilities is used to mark a boundary of a virtual operations area, and used to mark one or more obstacles within the boundary.