Joakim Tornhill writes:
This little tutorial came up as a request from some of the students on my Udemy course, but I add it on my YouTube channel as well, so you all can view it for free :).
How to make scratches in 2.81 using the old 2.7x method by taking the difference of Voronoi has changed a little. This because the Voronoi texture now is different.
So, I describe how you do it in 2.81 and also add a few "extra" things in there to make those scratches even nicer :). All for you that wants to play around with the Blender nodes!