I have wondered why nobody tackled it before, sao I did it. I have assembled materials on offscale scenery, both for Tinscale trains and for making Yule holiday villages. The new feature is on my site - http://www.thortrains.net Just scroll to the O/O27 section and it will be marked New and Special - Tinscale Scenery. The article tells ways to make great scenes, and there are illustrated lessons.
Also, I have designed and posted in the same section Holiday Layouts - a load of track plans for folks running trains udner the tree. There are plans for O / O27. S, Standard Gauge, G, HO and N.
BTW I am feeling very good this week - bought a NIB tie-jector car in Pennsy markings Tuesday night for $25
Happy Railroading!