Applies an invisibility effect to Chameleon Deathclaws when they move, however (of course) I added quite a bit more to this.

First, it's perk-driven: just give the NCF_NaturalCamoPerk to anyone you want to apply this to, including the player.

There are also eight available keywords to trigger the conditions under which the stealth effect takes place. You can set it to activate on moving, on NOT moving, in or out of combat, when it rains/snows, or in either daylight or nighttime. If the proper keyword is in place on the NPC and any of those conditions are true, the owner of the perk will go stealth boy.

The stealth trigger will take place if AT LEAST ONE of the available keyword conditions evaluates to true. You can't use one as an exception to another: if you set the OnMoving and Night keywords, it will trigger if at least one of those are true (it's either night or you're moving, or both). It won't mean "be invisible at night ONLY IF you happen to be moving".