So "Light fog; moderate darkness; & light foliage" all grant a small amount of concealment (one quarter). But you cannot Sneak Attack a target with any concealment at all. How many DM's inflict this on their poor rogues?
Trying to backstab someone in a shadowy alley? Too bad, that's moderate darkness, 10% miss chance, no sneak attacks. I can imagine this would make for a lot of mad halflings.
I'm surprised that there is not a low level spell (like a weak Fog Cloud) that fills an area with "Light Fog". The 10% miss chance is small enough to not both the fighters, but it really shuts down any rogues trying to get the flank on you.
Trying to backstab someone in a shadowy alley? Too bad, that's moderate darkness, 10% miss chance, no sneak attacks. I can imagine this would make for a lot of mad halflings.
I'm surprised that there is not a low level spell (like a weak Fog Cloud) that fills an area with "Light Fog". The 10% miss chance is small enough to not both the fighters, but it really shuts down any rogues trying to get the flank on you.