This. I'll skip the pages of arguments and just chime in with my expectation that when something is invisible it's, you know, invisible. I don't know that I really care that much about what RAW is, other than as a rough framework for my rulings.4. English. Dude, it's hard when it comes to rules. Just see "Attack" v. "Attack action," v. "Extra Attacks" for an example. You hear "Invisibility" and you have associations different than the specific rule.
A) A non stealthy lone mage casting invisibility to escape the party? Use the rules.
B) A non stealthy mage casting invisibility to escape the party in a room full of combat around? Don't use the rules.
IMHO the rules for hiding are quite clear, but they are also counterintuitive. That is why a lot of people have problems interpreting the hiding rules, because they expect the rules to make sense. Once you let go of that kind of baggage and only look at what the rules text actually says, discerning the RAW is simple.
I would not recommend running hiding by RAW though, since the rules are less than good. Going by common sense about when you think hiding should be possible and calling for a stealth check when needed works much better.
% chance of detecting invisible based on level?
The designed rules for invisibility are at best sloppy.
I don't know how many posts debate on this single rule. There are so many opposing positions and all of them are logic. My simple advice is:"Use whatever you wish depending on the circumstances."
Here are some examples.
A) A non stealthy lone mage casting invisibility to escape the party? Use the rules.
B) A non stealthy mage casting invisibility to escape the party in a room full of combat around? Don't use the rules. Why? Check this.
The battle had been raging on for many minutes as both parties were fighting each other. Then everything stops. Everyone looks in the direction of a lone invisible novice mage.
"We know where you are!" said his enemies.
"You did not take the hide action you dope!" added his friends.
The wizard then knew that the God of rule lawing was against him...