After a couple of evenings over the last couple days, I got skid marks working fairly well.  I had considered it a fluff component, but I also knew in my gut that skid marks could fairly easily show the player where a vehicle came from and whether it is under control or not.
Generating mesh polygons on the fly in Unity was a new experience, but it wasn’t so bad.  The odd thing is that I spent an unnecessary amount of time trolling the docs and forums for info on supporting quads, and whether I’d have to define things in strips and fans and all that.  Instead Unity just asked for every triangle defined individually, and shared edges were not even an option.  I guess it’s been a long time since I had to deal with individual polygons, and the graphics layer has become just that much more sophisticated.  Does that make me a 90’s Voodoo/TNT relic?
Besides, I’m dealing with maybe 50-100 polygons here, so I’m hardly taxing the system…