Questions about pass through mode of XR Elite

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Hi all,

I want to use XR Elite to do my research about compartion of sth between VR and AR.

But XR Elite seem to have some distortion between real world and pass through mode, especially when the controller moves in front of the camera.

Does anybody know why it happen?

And I want to know how does the XR Elite simulate the stereopsis through only one RGB camera, does it using the extrapolation?

I'll be very grateful for any supports or discussions that might help.

Thanks!