You guys are missing my point. All I'm saying is we should have a picture or text description telling us: A) time of day (night or day or dusk or dawn), B) What the weather is like. Thats it, not simulating its effects, even the DoD doesn't have computers powerful enough for that, just a meaningful message about what the weather/time of day is. Let the player go with that how he pleases.
TY DD for your help
Andrew