Hi, i've made a pool windows tutorial that is a bit different from others on the web. You'll have correct water levels & pool floor levels that maintains after
reloading or relocating your simlots.
Its my first tutorial, so bear with me.
Create your pool at ground level:
Create stairs 4 steps down, delete the stairs. Then Ctrl+Shift+C: constrainfloorelevation false
Level the lowest terrain to the edge of the pool:
Create a basement room:
Place windows on the walls connected to the pool:
Create foundations at ground level surrounding the basement:
Level the pool window walls to the foundations level:
Notice the water level is correct. It covers the top of the window,
but there's a slope at the edge of the pool floor:
Continue ...