This is № 481 of Pilentum's model railroad videos. If you’ve been around model railroading in O scale for a time, you’ve likely heard of Norm Charbonneau and his superbly detailed model railroad layout which was called “Greenbrook”. When you watch this video, then you will realize that it is a modeling masterpiece in O gauge. 100 percent of this layout has weathering effects ranging from a dusting of soot to a heavy cloak of grime.