I think in one of the live streams they said supports will be done separately from the coaster like in Nolimits 2; that would solve the issue because then, players could determine the support shapes and placement. I do agree though, the prefab auto supports should never disappear. I was placing vegetation under a coaster and the supports would disappear from time to time; it's vegetation - vegetation grows all over the base of supports some times in real life. Same with paths and buildings - if I make a building, the footer height should be adjustable so I can determine if the support goes through the building ceiling or not. For paths, supports should never disappear. Many roller coasters have supports that go over paths and sometimes they even have larger footers that guests can sit on like a bench. PC simply needs guest scenery occlusion so we can place supports and full buildings and scenery on paths without having guests walk through walls, supports, trees, etc...