Here is the fourth closed model.



For the closed half cubic_protection of swimming-pool : OFF


FYI :
1 - Put the model in same level (e.g. -3 m) that the swmming-pool with a good elevation (e.g. 2.365 m)
2 - You can update all textures of the pool roller
3 - You can update the width of the pool roller ( default is 7.59 m, + or -)

[;)]
.