Page MenuHomeFeedback Tracker

Full use of TrueSky weather in Arma 3
Reviewed, WishlistPublic


With the amazing new clouds in Arma 3 using Truesky weather, hopefully we can get all the TrueSky weather effects from clouds casting realistic shadows from the sun, moon and stars. TrueSky weather also has snow and rain effects. If you don't believe me check out the videos and information below and see for yourself! {F21822} {F21823} {F21824} {F21825}


Legacy ID
Feature Request
Additional Information

Event Timeline

ProGamer edited Steps To Reproduce. (Show Details)Sep 1 2013, 12:20 AM
ProGamer edited Additional Information. (Show Details)
ProGamer set Category to Feature Request.
ProGamer set Reproducibility to N/A.
ProGamer set Severity to None.
ProGamer set Resolution to Open.
ProGamer set Legacy ID to 3754755129.May 7 2016, 4:25 PM

that would be cool but i doubt they would add this so late into development

Bohemia added a subscriber: Bohemia.May 7 2016, 4:25 PM

@ProGamer, why? do everything!

Latest version of TrueSky.

DirectX 11 support.
Fully dynamic true atmospheric fade effects, including height-dependent fog and anisotropic scattering.
Truly volumetric clouds, faster to render than conventional sprite-based clouds.
Sequencing – keyframe control of clouds, time of day and atmospheric effects.
High dynamic range – all outputs in 16 or 32-bit floating point HDR.
Weather planning with Sky Sequencer. A production-quality toolset for designing weather effects.
Advanced real-time weather planning with Simul Sky Sequencer, a production-quality toolset.
Sky colours from physical calculation or user-defined colour keyframes.
Extensive range of API and engine support, now including DirectX 11.
Fully dynamic true atmospheric fade effects, including height-dependent fog and anisotropic scattering.
Truly volumetric clouds, faster to render than conventional sprite-based clouds.
Super-low memory footprint.
Built for multi-core.
Super-fast cached clouds.

Another point of info:

Simul announces the Sky Sequencer – a new tool for technical artists, animators and programmers. The Sky Sequencer edits a track of cloud and sky keyframes, so artists can plan out a series of weather and time-of-day events. The sequence can be played back in real- or accelerated time, to show the interplay of sky, clouds, atmospherics and weather effects.

A complete sequence, either one-shot or as a loop, can be saved and imported into any program that incorporates Simul Weather. To try out this powerful new tool, contact Simul on

PLEASE you payed for it USE it!

izaiak added a subscriber: izaiak.May 7 2016, 4:25 PM
izaiak added a comment.Sep 3 2013, 7:55 PM

You payed for it use it !

It will solved you problem or unrealistic rain ( NVG'S , rain inside building, etc ...)
It will allow snow !

It will allow several kind of cloud and different layers level.

You will win everything to use it at 100%.

All pilot of Arma and Sim will appreciate this tech and the game will be more realistic, more over if you achieve to do weather sync for MP.

E.g. of storm with rain:

coltti added a subscriber: coltti.May 7 2016, 4:25 PM

Snowing weather would be great for arma, even if armas default islands wouldnt be the kind to see much snow on. For the modders.

I just can't understand why they wouldn't add this feature. Than again, i still don't have an option for the dynamic fog in the Vanilla Editor. Not too impressed about that.

Rewan added a subscriber: Rewan.May 7 2016, 4:25 PM
Rewan added a comment.Dec 5 2013, 8:28 AM

You can access the Dynamic Fog with the SetFog + [Array] command.

It seems MP-unfriendly tho... (but it might be the place I used to make my mission that was MP-unfriendly so... worth the try I guess)

And Altitians (?) shouldn't see any snow if they have the same climate we have here. :p

rogerx added a comment.Dec 5 2013, 1:45 PM

Simply an excuse for getting out of doing more work. Think snow and other weather effects would be cool, especially hurricanes/typhoons. How about a random tsunami?

More specifically, there should be random weather affects with a gradient change setting to control the quickness of changes in environment. The settings currently are pretty static and dull. Even the open source FlightGear with it's real time weather effects out does the ARMA 3's weather. A quick fix would be to just implement more random weather. Shrugs. Much room for improvement with only a small text box here to type in all the possibilities!

Rewan added a comment.Dec 5 2013, 2:58 PM

Well since you seem so eager to see it : DO IT. Shouldn't be hard huh ? At least it'll keep the guys from BIS onto real bugs and stuff. (Even if I agree seeing snow on... european maps and def. not on Altis/Stratis would be sweet)

rogerx added a comment.Dec 6 2013, 5:41 AM

Rewan: FYI, ARMA is pretty much closed source, with some open source scripting interfacing. Besides, you probably shouldn't spend time mocking somebody already contributing much time to open source projects without pay. ;-)

My notes are merrily making others aware of already better integrations of simulating weather within (flight) simulators.

Rewan added a comment.Dec 6 2013, 8:22 AM

I'm not mocking you anywhere but okay.

Oktyabr added a subscriber: Oktyabr.May 7 2016, 4:25 PM

+1 for full truesky, especially the SNOW. We don't even have the weather effects module from A2 yet!!!

Anybody know what rainToSnow is?

Any news on this? Is there any way to access more of these features? Like say unlock the snow for custom maps? Or lowering cloud level?

EDIT: New features have long since been added and they would be great to have ok Arma, for example, built up falling rain at distance in for of a transparent down draft cloud, and also mountainous hugging clouds that would go perfect in mountainous regions in Arma 3. Being able to access all of this would make Arma 3 a REAL sandbox.

Yep totally agree - we need more weather effects like snow. Maybe BIS only bought the cloud sim module ;). I would also like to see the advanced fog system working like it did in the A3Beta. The fog array seems to have stripped down functionality.

From what I can remember, think they strip some of the weather effect down during Alpha/Beta due to performance issues, then reinserted rain later.

@rogerx> Odd though the fog array command seems to be the same but the functionality seems to not work like it did. If you use 0 setFog [1, 0.01, 0]; theoretically according to the wiki (time setFog [fogValue, fogDecay, fogBase]) you should get fog that starts at full density, that decays fairly rapidly with altitude and that starts on the ground. However all I get is a slight haze - I can't seem to replicate the cool ground fog seen in Dslyecxi's video:

gutsnav added a subscriber: gutsnav.May 7 2016, 4:25 PM

I'd really like the clouds to make shadows... An incoming thunderstorm blotting out the sun would look so cool.

RickOShay: All I can speculate is, the original fog was replaced with something a little more optimized. As usual, CPU/GPU optimizations seems to be a major issue.

According to SITREP #00084, "Programmer Lukáš Bábícek has in recent weeks been working directly with Intel engineers to find and implement optimization opportunities."

@rogerx> Actually the fog array works with older maps although the height falloff seems to work differently - I assume it has something to do with height calculation maybe a ATL / ASL calculation issue.

rogerx added a comment.Dec 1 2014, 5:41 PM

I recall that they processed a bug with fixing the altitude graphics. Something with looking from third person at high altitudes, something graphical was fixed.

Unknown if this is relevant, but might possibly help even though doubtful.

Yep - I managed to get it working but it would be nice if they added a slider to allow for easy changes in fog altitude and falloff - it's a tedious process trying to get low altitude fog exactly right.

10+ months and still nothing from BI? Common folks, give us some glimmer of hope!

Koala added a subscriber: Koala.May 7 2016, 4:25 PM
Koala added a comment.Oct 5 2015, 3:54 PM

related to #0013467 and #0025587

Any note from developers?

Dear developers, please give us a sign.

Will there be an update of the TrueSky plugin?

It would be great, if we will see an updated version of the weather engine with the release of the Tanoa DLC.

-no more wobbling clouds (if you turn your view)
-cloud shadows (if your engine support them)
-sunrays through clouds
-local (not global only) weather (netcode depended)
-maybe more weather settings


Some good points Koala!

I too would like to see those features, as well as local weather instead of only global weather.

But one has to realize, the only con would be further possible bugs though, requiring fixing! Also have to realize there are far few servers whom make use of the weather effects, including night night time. It is as if the remote multi-player server administrators have no interest in weather or night time effects. Which is entirely sad because players are then only using 50% or less of the possible game material that they have purchased. Most of the servers I have played on since alpha & beta, the weather is also clear and sunny, and retina burning while playing late at night I might add. One multi-player server did increase the speed of the clock, so players experienced night time every hour to two hours. (That was a mighty nifty trick I might add!)

Another deterring effect for promoting further weather features, the current radar cannot see ground or air objects below 1500k altitude. As such, nobody flies above 1,500k, even to (amazingly) avoid anti-aircraft missile fire! If the ground radar were able to see ground and air targets above 1,500k, then players would more likely fly higher.

Would you believe that, you cannot see air targets on radar unless you're flying below 1,500k?

TutSi added a subscriber: TutSi.May 7 2016, 4:25 PM

Thanks for not updating basic plugin bohemia!