Hi,

I´ve tested your mission on 1.66. Fog seems to be correct to me.

I recommend you to:

Update your GPU drivers
Try different video quality setting
Do you set fog through some script?
Happens it in some other mission?
Try check your scripts again

It´s possible that some your script reset certain visual setting.

After some further testing, it appears that the fog banding happens at very low fog delay values; on the order of 10^-8 or so. This can be tested with setFog - try "0 setFog [.4,3e-8,0];", "0 setFog [.4,8e-8,0];", "0 setFog [.4,5e-8,0];", etc.

The mission transitions thorough these values for some reason, it seems to do so consistently on our servers but I haven't been able to nail down a root cause and had trouble reproducing on my machine. Might be a mod/script. Regardless, it appears that the banding is the game having trouble rendering those particular params, not something wrong with the params themselves.

This is unlikely to be a hardware problem as many people reported it when the mission was played in multiplayer.

EDIT: I also flipped through some video settings, doesn't appear to affect things at all.

Hi,

Unfortunately, I was not able to reproduce this graphic fog mystery. I´ve tried various fog values and I seemed all correct. Maybe it´s worth to try various GPU and graphic quality settings because ir seems as hardware problem with shaders or rendering.

I tried to reproduce the issue by executing

0 setFog [0.8,0,0];

with the debug console.

I could not observe the issue in SP at all. However, as a client on a dedicated server, I also observed the fog banding issue (using "SERVER EXEC").
As mentioned by others before, in the case the fog decay value is non-zero, all worked fine, even in MP.

Appendix:

• Video by Tacplay with Achilles: https://www.youtube.com/watch?v=vksk_BiC3o4.

i confirm this issue. its most annoying and i dont use fog anymore.

Hi, reproduced. Proceeding to investigation.

@ookexoo
Can you send me fog setting screen in vanilla Weather parameter, please? Not in Advanced Weather Change module. I was capable to repro its behavior but in different weather settings.

Thank you.

@nomisum
I wouldn't say that the issue makes fog completely useless. You just have to avoid the critical region atm.

@Alwin
Here are the screenshots for my vanilla tests (Eden editor and as client on a dedicated server):

Edit: As Tacplays video was not recoreded in a reliable environment, I made one myself. I also printed fogParams in system chat (Youtube Link).

If there was a documentation which values not to use I wouldnt mind the issue.

Strange thing is: problem wasnt there from first day but introduced last summer IIRC.

@ookexoo

Thank you

I've encountered this as well and I have some test values (that work on the CUP Takistan map, unsure how it behaves on other terrains)

0 setFog [0.422057,2.46173e-036,0]; // small strip
0 setFog [0.422057,0.46173e-036,0]; // large strip
0 setFog [0.422057,0.46173,0]; // no strip

as a temporary stopgap I've implemented a watchdog that resets the fog values if a bad value is being returned

if (isServer) then {
    [] spawn {
        waitUntil
        {
            fogParams params ["_fog","_decay","_alt"];
            if (_decay > 0 && {_decay < 1e-4}) then {
                private _msg = format ["Something tried to set fog decay to %1, truncating precision to 0 solve visual issues", _decay];
                systemChat _msg;

                _decay = 0;

                0 setFog [_fog, _decay, _alt];
            };

            sleep 10;
            false
        };
    };
};

Hello, thank you for the clear repro.
We will see what we can do, to resolve the issue.

should be fixed in rev 150110