We wanted to add vertical waterfall to just completed mountain scenery (in another thread I told of removing masonite boards and building up chicken screen/plaster cloth/sculptamold).
We looked at several scenery book I have, and I am unsure what is latest, greatest, easiest, simplest way to add this. The Sculptamold scenery is already done but there are some convincing creases and openings in mountain that would look like where a fall could be, but we really don't want to re-do the plaster to add in waterfall plastic. Unfortunately the waterfall will end where the mountain bottom ends as there is no plywood base the "water" could run to/off of (maybe we will add scenery at bottom to hide falls end).
What is the latest techniques, OGR articles, reference books, YouTubes, etc.? I will admit being out of our comfort zone here, and results only have to be believable not spectacular "Trompe L'Oeil (fool the eyes art)" Niagara Falls. After all, how often will visitors stand in awe of a waterfall (unless its your masterpiece centerpiece, that incidentally a train goes by?) 
