I moved the location of the pool in my Sims 4 Amagiri and Saitou Sims' house... It used to be in front of the gym and now it's at the back of the gym. And this time I actually wanted to make the pool kind of look like an onsen... Well, I could place rocks all around the pool with MOO cheat, however, doing so makes my Sims can't sit on the pool edge... And I like this new feature; being able to sit on pool edge...! :@/ And so, I guess I just put some rocks on corners - like what you can see in the pictures above...
(Compromise, compromise...! It's always like that with Sims games... Even worse with number 4! x_x; Give me my bear costume already! Hmph!)