QUOTE (Midas @ Apr 11 2012, 12:11 AM)
Except that your arguement is not logical, as there must be a pixel overlay over the entire line of sight. Just because some pixels are blacked out and some aren't doesn't necessarily matter for Irion's book quote to hold true: there *are* pixels over the mage's entire line of sight, and it could be argued that this would affect magic. Certainly does on my table, although as I previously stated I understand this is a house rule.
As much as I don't like the idea of selectively blocking people out to avoid hitting them with a spell...
If a pixel in an LCD screen is transparent, it's no different than glass. Light passes through unimpeded, and is not being affected by the screen in any way that matters.
In a very real sense, LCDs are electromechanical, not electronic. Light passing through them is not being edited electronically, processed, or otherwise modified in any way. A photon has come from a light source, bounced off the target, and passed unaltered through the LCD screen to hit your eyeball.
Imagine a window covered with a bunch of mechanical shutters, spring loaded so they're normally shut. Each shutter can be pulled open via an attached cable. Pull the cables, and you can see through the window. Let them go, and your view is blocked. In this setup, I don't think anyone can claim the view through the window is being electronically processed.
Now imagine these shutters are so small that hundreds fit into a pinhead.
An LCD is just that, a mass of tiny shutters suspended in liquid. Send an electrical charge through them, and they line up so light can pass through. Stop the current, and they fall back to their normal random orientations, rendering the area opaque.
In any case, I get the very strong impression that when the authors say "technological visual aids that substitute themselves for the character’s own visual senses", they mean something that has taken in visual data, converted it into electronic impulses, and then recreated the imagery on a screen or image link. Like a camera recording digital video, passing it through a cable, and playing it back on a display.
Black spots on a pair of glasses aren't really the same thing.
-k