The simpler model to protect the swimming-pool is the manual 'horizontal curtain' or 'pool roller'.
The SH3D's model :
The model can be downloaded : HERE
FYI :
1 - Put the model in same level (H=-3 m) that the swmming-pool with a height = 1.20 m
2 - You can update the textured floor of the pool roller
3 - You can update the width of the pool roller ( default is 7.57 m, - or +)
Any comment or question are welcomed.
[;)]
.