In RIVER Lab 2, five retro-reflective markers are attached to the HMD via a custom 3D-printed frame for tracking the participant's position and orientation; any internal tracking in the HMD is disabled.
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In RIVER Lab 2, five retro-reflective markers are attached to the [[Head Mounted Displays | Head Mounted Display]] via a custom 3D-printed frame for tracking the participant's position and orientation; any internal tracking in the HMD is disabled.