So, you consider a screened enclosure that allows wind and sun through all day to the pool to be "indoors"? Your house would be awful cold in most parts of the country
This is my first pool with a screened enclosure, and now I wish I had done this in GA. Keeps bugs out AND keeps the pool reasonably cool during the hot summer months. It also is the cleanest pool I've ever had. I wouldn't ever build a pool again without a screened enclosure.
And it does significantly reduce the risk of sunburn. Screen cuts down the sun a lot. I can stay out all day in my screened enclosure and pool, and not get sunburn. If I go outside the cage and work, I'll get red in a couple of hours.