Larian Studios Forums Baldur's Gate III Baldur's Gate III - Help Tips & Tricks How does advantage work?

I have no prior experience of advantage rules since I have never played 5e. So I have some questions.

Firstly, with critical hits/misses. If you have advantage and roll 1 on your first roll, is that still automatically a miss? In other words, do you get a second roll to try again or not? I presume not, since I quite often critically miss with advantage, which would be a 1/400 chance if I got a second roll (since I would have to roll a 1 twice). It is also a bit confusing since a critical miss still shows the to-hit calculation in the log (i.e. it adds the bonuses etc before declaring a miss).

Conversely, if your enemy has disadvantage on you, but rolls 20 for their attack, is that an automatic hit?

While I am here, I seem to recall (though it has been a while) that critical hits do extra damage, but I don't see any extra damage in my game. Is it now just an automatic hit with no bonus damage?

Do advantage and disadvantage cancel out? So if I have disadvantage for some reason, but then move to height advantage, does this remove the disadvantage? I seem to find quite often situations where I expect to have advantage (e.g. height advantage) don't have it in the log. Is this because some other disadvantage (light low light) is cancelling it out?

Advantage and disadvantage is just rolling two dice at once. Advantage takes the higher roll and disadvantage takes the lower one. Criticals and failures are calculated after determining which die is used.

So with advantage, the only way to roll a one is to roll ones on both dice. The opposite is true for disadvantage. You need two 20s for a critical.

And they can cancel out if you have both; basically it becomes a regular roll. You also can’t have double advantage or disadvantage.

Criticals are either double damage or rolling damage dice twice.

Of course, that's the 5e rules. We don't know how the game calculates these things.

I am fairly sure, this is not how if is implemented in the game. As I said before, if a critical miss on one dice doesn't overrule advantage rerolls, then to get a critical miss with advantage you would need to roll a 1 twice - this is a (1/20)*(1/20)=1/400 chance. It happens way way more frequently than that. Also critical hits do not double damage in my game - they do entirely normal damage, without even a bonus.

The advantage thing might be a UI problem I think, because it quite often tells me I have advantage but doesn't give me a second roll (actually, this might be related to the critical miss thing - if advantage is being cancelled but it doesn't show up in the UI). So maybe a disadvantage is cancelling it but it still shows as advantage.

Edit: I just saw this post: https://forums.larian.com/ubbthreads.php?ubb=showflat&Number=759820#Post759820
It looks like the advantage/disadvantage UI is currently bugged/incorrect, so this may be the issue.