Basicaly do White Dragons using Snow Vision(Ex), have penalties to perceptions (checks and attacks) inside a Freezing Fog(SP) area?
The Blizzard(Su)ability (...) creates heavy snow conditions (...), so Snow Vision(Ex) sees threw it fully (no concealement for others).
But Freezing Fog (sp): (...) It is similar to an acid fog spell (...), acid fog (...)creates a billowing mass of misty vapors like the solid fog spell (...) spell functions like fog cloud (...) The fog obscures all sight, including darkvision, beyond 5 feet.(...)
They do have Blind Sense(Ex) and Scent(Ex) that basicaly allow to pin-point occupied squares but don't go threw concealement (or total conc.).
I feel Snow Vision(Ex) should see threw Freezing Fog (sp) but would it be too strong and against rules?
What about fog cloud?
Bit of thread necromancy, but the question was never answered.
If it can't see through fog cloud, it can't see through its Freezing Fog ability. And it does not.