Modding settings.txt OK for stock PBW games?

[AMF]

I have a few more questions for all youse mpa editing vets out there:

If I place a nebula, and I place planets, asteroids, etc in it, will they ever become visible to the players? AS I understand it, they would become visible when the players have a sensor that can get through Level 3 claoking - so at that point they will detect the planets in the nebula and then be able to colonize them?

And, in the same vein, to make those planets invisible do I set the "Mask Background Objs flag" on, or off? If I set it on, they will be hidden, if I set it off, the planets will be both visible AND colonizable?

Thanks!