3ds Max 2017 / 2014 / fbx / obj / stl / Marmoset Toolbag 3.01 / V-Ray 3.4.01 / Polygons 23581 / Vertices 23836

The Motion Tracker, also known as the Motion Scanner, was a simple motion-detecting surveillance device. Essentially, it was a high-powered ultrasound scanner that used doppler-shift discrimination to filter out moving objects from stationary background and then displayed them on the monitor as a series of contours of probable loci.