In previous edition you just had a negative dice pool modifier of 6 dice if you had no idea where the target was (because you could not see it due to an invisible spell, because it was 100% behind opaque cover, because you are blindfolded, because you are firing blindly around a corner without peaking around the corner or using a camera, because it is total darkness and you don't have thermographic vision, because you have the Blind negative quality and is not using astral perception etc etc). The blind fire modifier was also to be treated as the total darkness environmental modifier. To hit a target behind mirror glass, 1300 meters away, in strong winds without using a smartgun, through smoke without having thermographic vision, in the middle of a clouded night without any lights using a sniper rifle without any optics and while being blind folded - would result in a negative dice pool modifier of 10 dice (which mean a decent sniper would still have 10+ dice left, even more if he was allowed to spend a few actions to Take Aim first). And since the target would be considered unaware he would not be allowed to defend against the attack.
In this edition it seem as if your test will automatically fail if you can't see your target (I like this better).
In previous edition the Invisibility spell were resisted by mental attributes. If the spell was resisted then the target could be noticed (and attacked without the blind fire modifier, but if it was hiding then a perception test might be required in addition to resisting the spell). There was no negative dice pool modifier hitting a subject with an invisibility spell if you resisted the spell. Ultrasound ignored the invisibility spell.
In this edition it seem as if the Invisible # status effect is opposed by perception. If you beat the invisibility status effect then you can see (and attack) the target. There does not seem to be any negative dice pool modifier for hitting a subject with an invisibility spell that you successfully spotted. Ultrasound not only ignore the invisible # status effect, it now also grant the attacker an edge for attacking invisible opponents.
...SR's days of "invisible targets remain unseen after attacking" are now over.
Invisible subjects don't suddenly become visible just because they are attacking.
To see (so you can attack) a subject with the invisible # status effect you first need to beat the threshold with a perception test. This does not change just because the subject is attacking you (but if you have been made aware that there is someone out there then you might want to spend some major observe in detail actions on finding him).
At least that is how I read the rules.
Ok, Thank you all. I was specifically looking to see if it was explicitly called out in the book or was left to GM Fiat.
But.... It is?
They need to take Observer in Detail major action to have a chance to spot you.
They must be successful with their Perception test to spot you.
This part is RAW and not under any debate at all.
6E p. 223 Concealment
In combat, an Observe in Detail Major Action must be used to allow a Perception test to attempt to overcome the concealment.What people seem to debate is if you can shoot at someone that you cannot see. In 5th edition this was explicitly allowed (as long you accepted a negative dice pool modifier of 6 dice). In this edition it is not (and it seem as if characters will instead automatically fail any tests involving visibility if they can't see their target).
