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