JC3 appears to work mostly ok in triple-wide resolutions... when it doens't crash with a BSOD just as it finishes loading into the main menu. This happens about 50% of the time for me, but I think this tendency to crash is lessened if the game is started up at a lower resolution, then scaled up after it's done loading. (After the 1.0.2 patch at least. Earlier versions would crash badly if you tried that)
My one and only gripe though, is the FOV. It's insane how narrow it is by default. Even on a triple-wide display, it feels like playing through a telescopic view. I've searched far and wide for any fixes, but nobody appears to have found a way to tweak it. There certainly is no exposed setting for it (even though JC2 and Mad Max both had ways to tweak the FOV).
I then proceeded to search for FOV settings inside the game data, which is in itself quite a task... All game files are packed away (thankfully now unpackable thanks to Gibbed's modding toolset). The only reference to FOV settings I could find was in a file packed in game5.tab under \game5_unpack\scripts\modules, called camera.xvmc. That file seems to be translatable into an xml file, which contains a number of array definitions. On looking at the xvmc file itself with a hex editor though, I've found this:
That is the only mention of FOV so far I've encountered anywhere for this game. I suspect the values defined in the xml may relate to return values from methods compiled in this script (assuming that this is some sort of code file). Testing this is going to be quite a job though. I've never tried any modding on the Avalanche engine, and I've got very little to go on as to which values to actually change.
In any case, it's at least something to look into.
I'll write back if I manage to make any more progress on this (which is unlikely, as KSP is currently taking up all my time and mental bandwidth, as usual, and that ofc takes priority over anything else). In the meantime, if someone else wants to follow up on this lead, by all means, have at it. You'll need a hex editor and Gibbed's modding tools for JC3, available here:
http://justcause3mods.com/mods/gibbeds- ... e-3-tools/Cheers