OK, i think i see the cause of the confusion...remember that the paragraph that talks about inanimate objects and using the OR Test on page 182 is errata'd...there is a sentence missing which adds the above quote's requirements, that the Force of the spell must be greater than OR/2 to even affect the object. this same paragraph, however, also says the TN is the OR.
Well, since the TN for the spell is predefined, does that rule out the second part of that paragraph, that the Force must exceed OR/2?? NO!
if this is what people meant in the original discussion, then i misunderstood, because i thought they were saying the TN to affect the camera was its OR, and the rating of the camera played no part...
so, in summary, i propose the following example:
Joe Runner is about to make a run against MeanieCorp. MeanieCorp has just installed a new security system, complete with cameras (Rating 5). These are just standard optical video cameras, based on today's tech level, so we'll call their Object Resistance an 8. Joe decides he wishes to cast an Improved Invisibility spell on himself to try and sneak past the cameras. First, he must cast the spell at Force 4 (or higher) to even attempt to trick the cameras - he decides Force 4 is enough. He will roll his Sorcery (let's say 6) and Spell Pool dice (let's say he uses 3) and must achieve a Target Number of 4. Joe's attempt at casting the spell is 2,2,3,3,4,5,5,7, and 8, thus giving him 5 successes.
Outcome 1: Joe wins
The camera (the observer)now resists the spell, using 5 dice and rolls 2,3,4,4, and 5, giving the camera 3 successes. OK, Joe has 3 Net Successes, and therefore the spell works and the camera does not notice Joe.
Outcome 2: Camera wins
The camera (the observer)now resists the spell (TN is the Force of the spell), using 5 dice and rolls 4,4,5,5, and 8, giving the camera 5 successes. OK, Joe has 0 Net Successes, and therefore although he cast the spell, and he hopes it is working, the camera does "see" him and Joe will have some surprises waiting around the next corner...
Now, if this is correct, it begs some questions:
1. First, are there any Device Rating for cameras, unless you want to muddy the argument by calling them sensors (see below). It does mention that cameras can have various accessories and modes, such as low-light, thermo, etc, but these don't change the rating of the camera. All of the cameras in the basic book seem to have no Device Rating, although some may reason that it is implied (as do I). A higher rating would mean that the camera has better quality optics or CCD chip, options such as low-light and thermo, etc.
2. I'm assuming that no one is watching the camera in the above example. Therefore, just because the spell fails, does not mean anyone sees what the camera sees - it just does its job - if Bob the guard is asleep at his post, then he's not going to see Joe on the monitor that shows the camera's angle of view. if the picture is being recorded, then if someone reviews the recording later, they will of course see Joe crossing in front of the camera. Right??
3. OK, now what if instead of just a camera, we're talking about an active guard watching a monitor that is displaying that camera. If he is awake and only watching the one camera, who is actually doing the perceiving of Joe?? If the camera does not "see" Joe, then the guard doesn't either, right? Does the guard automatically see him if the camera does?? I say yes to both.
4. OK, now there is a guard watching a bank of 4 monitors that each monitor about six cameras. For this, I would first see if the camera "sees" Joe through the spell, and then give the guard a Perception test to see if he catches it on the monitors, right??
5. The micro-camcorder says that it can be programmed to record upon recognizing movement, so i postulate that there is some kind of programming involved for image recognition to determine a change in the picture. If you're using such a program, or if the camera feed is being processed by some sort of security program or even smart frame, how does this affect the scenario (other than you should obviously increase the Obj Resist of the camera to 10 or above, based on its technology - is this all that needs to be done?? What about the rating of the program/frame - how is it resolved, extra dice for the camera's resistance test??)
6. OK, now what about those that would treat the camera as a Sensor, or just say that Joe is encountering Sensors. Since they are (in the above example) Rating 5 sensors, whether or not a guard is watching is immaterial, as you make an Active Sensor Test against the Signature of the target (for a standard meta, a 6). Or do you continue to use the Rating to resist the spell. Or do you do like in the guard example above, where you resist the spell first, then see if you can pick up the Signature - that hardly seems "fair"...
This is where I begin to have my problem. Sensors are somewhat "intelligent". But with the Improved Invisibility spell, it has a flat TN of 4, regardless of the Rating of the Sensors, and the Force of the spell required doesn't change either, without GM option - it just falls under "10 or above". So, Joe can go into a Stuffer Shack with a Force 5 spell and a TN of 4, and succeed almost every time, as the Shack would probably only have Level 1 Sensors (1 die to resist), and must get not only a 5, but then has to get a 6 to detect the Signature (yeah yeah, based on Perception mods, it might be lower - or higher!). Joe can then go into an Ares facility that has Security grade sensors (say, Rating 6) and cast the spell with the same parameters, with the only difference being that the sensors now have 6 dice to resist the spell (compared to Joe's 9) and then turn around and make a Signature test against a TN of 6. Odds definitely favor Joe or any spellslinger as long as they have more dice to throw than the sensors, as the target number is still a 4, no matter the rating of the sensors - this is what i don't like...
However, I have some suggestions:
1. Maybe i'm misunderstanding or reading it wrong - should the camera/sensor/what have you be resisting the Force of the spell? I ask because although that is the definition as per pg 182, I'm feeling as though I could be convinced that is for Directed Illusions only. Maybe Indirect Illusions should be resisted against the same TN as the caster needed to cast, since you are "looking at a reflection" so to speak. Having cameras/sensors or even living creatures resist a TN of 4 would be VERY balancing...
2. I would propose starting sensors at a 10, and adding their level/device rating to the Object Resistance test. That would make the required spell to trick them much higher, and greatly decrease those that can do so. Imagine in the above example that now going into a Shack required a Force 5 spell (10 base + 1 sensor level, divided by 2), but going into the Ares secret facility would require a Force 8 spell (10 base + 6 sensor levels, divided by 2). What's nice about this is that it makes the mage more dependent on teamwork, as you'll want a rigger/decker/techwiz around to perform EW on the sensors in order to lower their effective rating or knock them out all together...
OK, i'm zipping up the asbestos suit now...