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3D environments are very popular among gamers and ever more used for simulations and serious games. The educational value of setting an adventure/simulation in a Virtual World (VW) is significant, in particular when training a workforce in performing dangerous/special tasks. However, when it comes to the exploration of a world to learn from it - as it happens in several real-life experiences - there is the risk that a lot of "knowledge in the world" is wasted because of a lack of appropriate guidance and the difficulty of providing more in-depth information about some items without interrupting the flow of the game.
Bellotti et al. (Wed,) studied this question.