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Do not place virtual objects behind walls, or other physical objects in real space. In this case, when the user tries to approach the object, they may injure themselves by colliding with real objects. Eye fatigue and awkward sensations also increase due to incorrect depth information.
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When displaying a modal UI, such as a dialog box or other overlay information, display it with consideration for the depth of virtual objects. When displaying an important dialog as an overlay, virtual content must be dimmed or hidden so that the user does not feel confused regarding the depth of objects.
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When displaying small-sized objects, users can easily get lost. This is because they can move freely and look anywhere in MR. Therefore, it is recommended to provide clear visual and auditory cues when displaying small-sized objects to guide users.
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When an object bigger than the actual physical space is overlaid on top of the environment, this can lead to confusion about what is real. To avoid this, you can either make the background of the virtual object non-transparent, effectively hiding the real-world behind it, or you could clip the object so it doesn’t exceed the real-world space boundaries.