In several games I seem to be experiencing inappropriate colors in fog/"foggy lighting." These games are quite old, as I'm running them on an old system. Two prominent examples are Splinter Cell: Pandora Tomorrow and Anachronox.
I'm running a Radeon HD4670 AGP on WinXP 32-bit with P4 3.0 GHz, 1 GB RAM.
I think it may be related to a certain ATI or game setting. As I'm no expert on this kind of topic, I wonder if anyone knows what setting might cause such anomalies in fog.
In Pandora Tomorrow, lights that cast a "foggy" light emit a strange reddish glow (whey they shouldn't) and the lighting conditions change abruptly when you move the camera around, so apparently it's not only related to color but to "collision" as well, e.g., one minute the room is barely lit, I move the camera a few inches, and there's light all over the place.