See the current on-line issue of Garden Railway Magazine for my new article on making a stable sub-roadbed using a commonly disgarded item. 
https://www.trains.com/grw/how-to/projects/roadbed-made-from-plastic-carpet-chair-mats/
“Natural” archway carved out of feather rock. I guess you are referring to the shadow it casts.
That’s very clever! I may have to try this!
Eric
See ~2:40:
I’ve always been in awe of your layout and animations, Todd. I have lots of ideas along those lines; but you actually DO it. Wonderful work.
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