Dan,
I have done “this” before in the sense that I have had both HO and N layouts in the past where I have done scenery. But I have never used any of the techniques I am using here. I never made my own trees always bought them and my base was plaster and paper over wire forms. So I might say I am familiar with what I am trying to achieve but the way I am going about it is all new to me.
There are three main people to thank for the ideas that I am using. Vic is my idol (yeah I said it Vic) his pizzas and his willingness to absolutely stand in defiance of the Large scale rules led me to my dream of this micro indoor. He has taught me to forget everything anyone has told me about Large Scale. He proves that tight curves, clearances in the mm range, and radically reduced proportion buildings can still look very good. Ty (Landrel) Brown has some of the most solid indoor work a person can ask for. Almost everything I am doing is some adaptation of how he is doing his. He not only uses readily available and cheap products but he posts excellent how-to videos on how to apply it. And then my buddy Korm. He thinks outside the box and his indoor uses so many different ideas that he could easily write a book. He looks around everywhere and sees modeling potential. His wife must run scared when he gets that look in his eye. . . no that’s not what I mean rooster, what I mean is he must rummage through the house stealing everything and cutting it up to stick on is layout. Honorable mentions have to go to Ray Dunakin for he absolute genius modeling and laser focus on detail, Eric for his creative use of materiel and excellent hand carving work. All of these guys and many others on here just do inspiring work that I do my humble best to emulate.
If I do something that inspires someone else and can pass on what I have discovered then it is a huge bonus and I have paid my debt to the community.