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I was looking at the Intel RealSense R3 documentation and in the “Working with Screen Rotation” section: https://software.intel.com/sites/landingpage/realsense/camera-sdk/v2016r3/documentation/html/index.html?doc_advanced_working_with_screen_rotation.html states that Face tracking and Hand cursor algorithms are sensitive to screen rotation and the camera should be used in the correct position (see table 17). So, due to the nature of the Face tracking and Hand cursor algorithms in the SDK, the user should use the camera in the correct position (rotation 0°).
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