4.6 Appendix: Overview and Results of Parallax Experiments

Although content with strong parallax adds to the appeal of the 3D experience, the stronger the parallax is, the fewer users there are who can perceive the stereoscopic 3D images. This chapter shows the results of a parallax study conducted by Nintendo.

Nintendo is currently considering whether to provide additional information.

4.6.1 Experiment Summary

Adults (between the ages of 20 and 40) and children (between the ages of 7 and 12) played two different versions of the same Nintendo 3DS game that supports stereoscopic 3D for one hour. Each version of the game used different parallax values.

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4.6.2 Content of the Game Used for the Experiment

A 3D shooting game was used. The player controls a craft that flies around a scene rendered in 3D and attempts to clear the stage while avoiding obstacles and shooting down enemies. Two different values were used for the maximum parallax between the images for the left and right eyes at the deepest part of the 3D space (in other words, the area furthest into the screen), 10 mm and 20 mm. The craft controlled by the player is located at a fixed depth slightly behind the plane with a parallax of 0 mm (it appears to be floating slightly beneath the surface of the screen). The player can change the viewpoint to the first-person perspective as seen from the craft.

Figure 4-5 Game Used in Parallax Experiment

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4.6.3 Result of the Experiment

The percentage of users in each group who could see the 3D effect without issues during the test play is shown in the figure below.

Figure 4-6 Parallax Experiment Results

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