Darkness Spells

I keep looking through the forums and using the search function but I'll I'm coming up with is WoD stuff and Dark Heresy stuff, so sorry if this has been answered somewhere. I'm trying to find a clean, easy way to make a field of darkness where it will snuff out any lights in the zone, and it will only allow charecters with "dark vision" to see. Maybe I'm asking something too complex, but I really want to snuff out my party's ability to see and I can't figure out a way to do it,

Fog of war?

The fog of war will not allow the players to see themselves......I want them to be able to see themselves on the board so that they can continue to move around,.

Global Dynamic Lighting and add light sources wherever there should be light? You could probably then draw a circle on the Lighting layer for the darkness effect to block outside light getting in the spell zone. Could get tedious if you have to go back to your maps and add lighting if you don't already have it setup.

You could just uncheck each players "has sight" box. It has the effect your looking for I think, token visible, everything else black. It would be a pain in the butt if you had a lot of players though. Someone could probably make an API for it.

TokenMod could be used to create a macro that would flip the has sight on/off, but this is of course a mentor API feature.

Yeah, once you get into the realm of API, you could do a load of things for this situation. You could get pretty complicated, really. It would take some serious coding, but you could probably introduce "negative" light sources that could dynamically reduce the light radius of tokens that got near them, which might give you the effect you want. Would take a load of code, but might be cool!

I've used your (Aaron) token-mod script to great effect with a various macros to simulate this at times. I also have a cheat sheet telling me which character has which type of vision (DND 3.5) low-light, dark vision, normal, etc.