I came across some of this over the weekend as I was trying to set up a river ride between a path with a path bridge leading up to a raised path plaza area. I got everything in place and then couldn't get the water to go high enough. Some people in another thread helped me and I realized that there is an issue with water too close to a path. I deleted the plaza and moved it a bit further away and everything worked perfectly. Every virtual toolset has it's own idiosyncrasies that are frustrating until you understand them. Once you do you just build with them in mind. The more I learn about the building and terraforming tools in Planet Zoo the more I really like them. Especially the terraforming, it's actually quite amazing.