You don’t need to hide the whole thing. Even without resorting to machines, the human eye is a lot smaller than the human body, and it doesn’t need full sunlight to function. If you’re looking for a person, something the size of an eye, 10,000 times fainter than it should be isn’t going to catch your attention, is it?
Seems like the Predator cloak is pretty close to what I’d expect real world.
He was invisible standing still. There was a slight shimmer when he moved.
Any technology they develop would have a little lag time
Yeah, if we can do stuff like this, there is a lot of room for creativity and fun. You can walk around headless and freak people out (though I imagine being headless wouldn’t be legal for too long). Or you can make a hand invisible to start conversation about how you lost it in The Chainsaw Incident or whatever else you can think of.
Wouldn’t work. All the higher level bad guys keep a sack of flour handy to detect invisible assassins. That trick has been out there ever since the thieves’ guild scored a copy of the Dungeon Master’s Guide in 1983.