Try as I might I can't find this exact things.
Question1) So I cast silent image and make a wall in front of me. This is giving concealment to everyone behind the wall. If I yell out to my friendlies that it's an illusion, do they still need to interact with it get a will save? or can they just walk through it?
Question2) If an enemy sees someone walk through it, or fire off a ranged attack through it, does that provide proof for them to see it's an illusion?
Question3) Could I make the wall a 1 way mirror? So from the front it's a wall, but from behind it's nothing?
Also if you have any page numbers or links to show that'll be a great help
So far I've ruled all of the above as yes (still have to interact, but at a bonus, can't just walk through), yes, and no.
You can interact with something via sight if you see something walk thru a wall. It doesn't make the illusion automatically fail, there's many other explanations in a magic world. Being warned would work simiarly. There's nothing by Paizo I know of on this subject but there's Rules of the Game articles for D&D 3.5 if you'll accept those.
A real one-way mirror depends on lighting differences on either side - good light on the side to be observed, poor light on the other. If you have those then you should be able to take advantage of them but you might need other magic to set up the situation to your taste.
Silvered glass mirrors appear a time or two as magic items, and I think some of the more technically advanced areas may have a few as well. A one-way window is basically a badly silvered glass mirror.
1) if you tell your friends that it's an illusion, they get a save at +4. If they trust you they can just walk through it even if they fail the save but the wall will appear solid to them.
2) If an enemy sees someone pass through a solid object that should make them suspicious enough to allow a save. A small projectile would be GM's call. In the middle of combat it would probably call for a perception roll.
3) If you create an illusion of a wall and stand behind it anyone looking at it would only see a wall unless they interact with it or otherwise make a save to disbelieve. Anyone who saves can see through your wall almost as if it weren't there. So one way viewing!
Were you actually asking about making an illusion of a mirror? I don't see why you couldn't make your illusion refelective.
Were you actually asking about making an illusion of a mirror? I don't see why you couldn't make your illusion refelective.
The idea would be to put up a wall that I can stand behind and attack from (or have my allies attack from), but the bad guys can't attack me since I'm behind a wall.
I guess arrow slits arn't good enough? I think the idea my player is going for is to be able to have the party standing behind a wall, gaining total cover from the bad guys, but still be able to attack the bad guys.
Or, I think, create a wall like from a video game. Where it's only a wall when viewed from one side, and the other side doesn't even exist
And if you make an illusion of a window, it only shows what the creator imagines it should show, not what is actually on the other side.
But how would that be different from creating a wall with arrow slits in it? Couldn't you just create an illusion of a wall and decide that there's openings/holes in it? This way you can safely attack with cover.
On that note, if you create an illusion of a wall with a door and windows, do you need to recast the spell to open them, or could you 'move' the illusion to open them?
This would be operating off of silent image
* Overall, I suggest looking at the various different rules, faq, and forum post regarding the different Illusion subschools before anyone starts messing with them. Seriously they are a pain to understand at first, but very rewarding once you get them.* P.S. Always ask the GM how illusions work in their games as that tells you a lot about what you can and can't do.
In this case I am the GM, but I'm trying to understand the rules first before I just make a call. So much time spent on illusion research, I'm starting to feel like an actual wizard.
But I'm also trying to think of how my players will try to 'game' the system or do a work around. Like deciding to make a wall that can only be viewed from one point. Figment's state that everyone is seeing the same things, it's not personalized. Is the same exact wall for everyone, it's just one side has nothing on it or can be seen through
Figment's can't change something, so you can't use silent image to make a blue ball look red. But couldn't you just put the illusion of a slightly large red ball that has the blue ball in it? Or make the illusion of a barrel that is larger then you, and hide in it? It's not changing the subject, it just happens to have the subject inside the illusion.
The yelling out I feel much more confidant on. Illusionist casts a spell, let's the party know. Party can interact with it to get a +4 or simply trust the illusionist enough to just walk through it.
A Silent Image of a wall, as a figment, 'remains as a translucent outline' for anyone that saves (the caster automatically) so anyone that saves will be able to see through it, from either direction.
Even if a party member doesn't save, they will be able to walk through it if they were convinced to do so, providing 'proof that an illusion isn’t real' so they wouldn't need a saving through, making it a translucent outline to them.
A Silent image of a wall could contain doors and windows, and ' You can move the image within the limits of the size of the effect' so opening and closing them seems perfectly reasonable. Of course as a silent image, this won't make any sound at all, quite possibly providing opponents the +4 to their save. Equally any attacks that go right through the wall would at least provide the +4, possibly the 'proof' that it isn't real.
The 'blue ball inside a larger red ball illusion' has been something questioned many times. On the one hand there is the 'Figments cannot make something seem to be something else' rule on the other, as you point out, it doesn't seem different than being behind an illusion of a wall. As far as I know, this has never been answered in a definitive way.
My interpretation is that since it isn't a glamer and hence isn't tied to the object it is concealing, a person hiding in this way is very limited in what they can do without breaking the illusion, in particular motion would be horribly likely to mess things up. This isn't just moving from the square, in your hiding in a barrel example, even the normal motion of combat while remaining in the same square would constitute your arms and legs at the least moving in and out of the barrel, in game terms, I would consider someone remaining motionless enough to be conceal by the barrel to be 'helpless' (and of course unable to take most actions without ending their concealment) meaning that the tactic might work, but it is also risky, a decent balance.
Even someone else trying to move the illusion to keep you hidden (assuming of course that the illusion is something mobile) probably isn't going to work, since, once again, it isn't a glamer and connected to the subject. While you might move the illusion from one space to another at about the same time as someone who is hiding in it moves, their limbs and such won't be moving in sync, likley presenting proof that it is an illusion with someone hiding in it.
The last couple of paragraphs certainly aren't 'rules' just how I look at it, but I think it is a decent compromise.