Statting accessibility "except when watched" and mechanics thereof?

[Plane]

Originally Posted by David Johnston2

That one was harsher though because it was only useful against cameras.

Even then I think it only worked because there wasn't a sentient person observing through the camera, only a simple computer system.

Only if Unobserved -20 and Machines Only -50 and Switchable +10 works out to -60, but the way Invisible Boy had to pause and recite a mantra, probably had some combination of "requires will roll" and "takes extra time" and "preparation required" to bring it to -80.

I can't remember if he removed his clothing or if it just fell to the ground (insubstantiality?) when he turned invisible.