Skin color Matcher is normally a Node combined from a group of Nodes which many of us have already used in different ways .basically it gives the input color of the subject to the comp plate . This can be used for multiple Beauty cleanup shots which requires Clean plate tracking and shots which have a lot of Color correction to make.Motion Blur and Defocus have been included so that abnormality can been masked out . Unpremultiply the premultiplied comp plate to get more accurate out The Tracker and the Smart vector path are for applying motion blur to comp plate by connecting it with the particular 2D Point Tracker and Smart vector then click the respective box from the properties tab to enable the kind of tracker used in the shot .