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Assetto4Seasons 3.2

Assetto Four Seasons, a weather engine

  1. fabrizio piedepesante
    Hello everyone. Here it comes a project I started working since April after some preliminary discussions with the developer of Content Manager. Roughly 200hrs of development and roughly 28,000 lines of code.

    This mod is optimized for Dynamic Light which runs (at this moment) only in 64bit mode; so even if A4S runs on both 32bit and 64bit mode, if you use it in 32 bit mode not only you will not have Dynamic Lighting but you may experience low light (and overall bad visual experience) when it is dark.
    Dynamic Lighting is still in development, so there may be here and there some minor lighting issues which are not per, se, related to A4S.

    I know many want to use (or at least try) this mod in VR. Unfortunately I don't have VR so I have no idea how it looks like in such setup. Some scenarios (maybe most of them?) may not be usable. It's not laziness, but simply I really do not know how they render in VR, thus I cannot even make a "patch" or a dedicated "spin-off version", at this moment. One thing is sure. I plan (I'm saving) to get a VR gear, thus I've a personal interest in having something of this kind working also in VR.
    First things first. If you came here from AssettoByNight, you will not be disappointed. The night scenarios are visually amazing and they come in many more variations; more and better than ever. But Assetto4Season is much more than that. It is a real weather engine, leveraging on the scripting support provided by Content Manager.
    Assetto4Seasons (A4S) uses some variables (current season, time of day/night, level of humidity, track location, wind and air temperature plus some random factors) to craft the weather scenario on a per race basis. All the variables impact not only the visual experience but also track caratheristics such surface temperature gradient (and in the future, likely also the grip level).
    With Assetto4Season you don not select the weather, you set-up the weather key variables and A4S will do the job for you.
    Assetto4Seasons reflects my vision of a weather engine; I do not want to bother about selecting the "weather" that I like most; I wanted something at the same time easy to use, but powerfull enough to use the weather settings I chose to craft a credible and visually appealing race environment, predicatble at some extent but still capable bringing some unespected suprise (just like in real racing). And this comes especially handy if you setup a long championship (spanning several seasons).

    Key Features
    Dynamic Lighting; support for CM Dynamic Lighting feature (headlights and other sources projecting lights)
    24h Day/Night ; full coverage of both day and night
    Sun and Moon; Sun and Moon scenarios , with Sun/Monn position asjustment, and obviously stars
    Variable sky; stormy, overcast, cloudy, mostly clear and clear sky, with speed and pattern of clouds reflecting the wind setting
    Variable ambient; clear, haze and fog reflecting the level of humidity
    Varaible track; dry, wet, very wet with temperature adjusted to the actual weather conditions
    Seasons; the chosen season will affect the overall visual experience, the timing of moonrise/moonset sunrise/sunset, as well the mix of the above weather variables
    Location; the climatic conditions, as well some lighting caratheristics are influenced by the track location (latitude/altitude) of the track (region and altitude).
    Championship support; support for custom championship
    Credible Weather Engine: weather condition reflects the combination of air pressure, air temperature, humidity level, wind speed, time of day, season, latitude/altitude of the track; weather conditions are consistent across the day and night and across consecuitve day to emulate a credible evolution of the waether.
    Credible Sun Path; the sun path in the sky replicates the behaviour expected for the given location (latitude) an season.
    4.0.0 - date to be defined

    Will bring the track state (grip) adjustement related to the actual weather conditions plus some further visual and functional improvements.

    In the archive (.rar) you will find 12 folders which correspond to the current release of the Assetto4Seasons comprising the Spring, Summer, Autumn and Winter seasons.
    4 folders provide the A4S fuctionalities in QUICK RACE menu and the other 8 folders provide the A4S functionalities for setting up a CHAMPIONSHIP (see also update 6 changelog).

    More video will come. Consider that the mod allows hundreds of different sceanrios, and a video for each variation is simply not feasible. Anyway, below few videos of the Mod in action.


    In itslelf the mod has excellent performances which could decrease slightly depending on the number of clouds and wet effects. Anyway in dark scenarios, when the Dynamic Lighting feaure is involved, the FPS hit is appreciable.

    [UPDATE] I've noticed some stuttering when wet effects are enabled. I'm investigating it.

    Be sure to have installed the lates release of Content Manger and latest release of Dynamic Lighting Add-on (https://acstuff.ru/f/d/28-shaders-patch-dynamic-lights), then:
    - Dowload the archive
    - If coming from a previous A4S release delete the previous A4S folders (you may decide to make a backup to be on the safe side)
    - Extract the content of the archive into the "/assettocorsa/content/weather" directory of Assetto Corsa, and, if prompted, overwrtite. That's it.

    Select the track, your car and your opponents, then:
    - Select the Season from the "WEATHER" menu under the "A4S" dropdownlist
    - Select the time of day/night from the time slidebar
    - Select the air temperature
    - Select the wind speed
    - Race!

    When setting up a CHAMPIONSHIP:
    Wwhen configuring a "round" in the Custom Championship menu in the time frame 8-18, select the "<Season> - CHAMPIONSHIP DAYTIME" of your choice, set the time of race and then the other parameters, then save.
    - when configuring a "round" after 6pm (18), select the "<Season> - CHAMPIONSHIP NIGHTIME" of your choice, set the race time with 11 hours offset; in other words if you want to run at 20:00 please set the time at 9 (since 9+11 = 20 = 8 p.m.), if you want to run at 4 a.m then set the time at 17 (since 17 + 11 = 24 +4 = 4 a.m.). Then set the other parameters and save.
    Let's make an example of a short 3 races championship happening between August and July.
    Let's imagine I want to race at:
    - Imola (ITA) at 14:00, where it is summer
    - Yas Marina (UAE) at 20:00, where it is summer
    - Bathurst (AUS) at 22:00, where it is winter
    This is I would setup the championship:
    ROUND 1
    TIME: 14
    ROUND 2
    TIME: 9 (11+9=20)
    ROUND 3
    TIME: 13 (13+9=22)

    Hope you will enjoy.

    Does this mod impact performances?

    Most scenarios have zero impact; few of them, those with a lot of clcouds and water effects, may slighlty decrease the performances. Also, the Dynamic Lighting add-on may hit the FPS when several cars are on the track.

    Is it safe to install?
    100% safe. It does not interfere neither with the vanilla weathers, AssettoByNight or the GoodAndBad weathers.

    How do I uninstall the mod?
    Simply remove the directories/files you copied during the installation.

    Do I still need AssettoByNight for the night scenarios?
    NO! Unless you running in 32bit mode with no CM Dynamic Lighting support, Assetto4Seasons is just better in everything. And it wil get better and huger.

    Today I've tried hundred of time to get a specific weather but with no luck. Is A4S working?
    Yes it is working; try to change the Season. Anyway, the pseudo-randomiztion algorithm is tied to the current date. With this feature all weathers you will get in a given day are coherent.

    I want the fog/haze, how do I get it?
    Lower the air temp and the wind speed to increase the chance.

    I want a wet track, how do I get it?
    Lower the air temp to increase the chance.

    During the race I get the wrong time on the day/night.
    It is an issue related to the CM Dynamic Lighting add-on. To my knowledge it should be fixed soon.

    In the RACE MENU the time slidebar is fixed to 0-18. How can I race at night?
    You have the evaluation (free) copy of CM. You should get the full version of CM (is donation based).

    What happened to the SMOKE effects?
    Currently I'm using the smoke effects to produce water effects. One or the other. In the very near future you'll have the option to have smoke effects instead of water effects. I'm investigating the possibility of having both. Right now if you want SMOKE effects (getting rid of of water effects) simply remove the following files from every folder:
    - "tyre_smoke.ini"
    - "tyre_smoke.lua"

    I noticed some stutter with water effects?
    Yes I know. In the future there will be an option without water effects but with smoke effects back.

    I find a bit convoluted the setting up of a CHAMPIONSIP.
    A4S in itself fully support the CHAMPIONSHIP mode in a very nice and user friendly way. Unfortunately at the moment the Extended Time Slidebar (time ranging between 0 and 24) is not supported by CM in championship mode. I had no other choice for the Championship mode than splitting the mod in two (night/day).

    I find very hard to drive in some circumstances; tyres never warm up and when it is cold/wet/night they cool down. Your mod does not work!
    It works and it works fine. I do not change the grip level of the track (for the moment) and I do not change the physics model. All I do is adapting the track temperature to the actual weather conditions, and from the tests perfromed the track temperature is always pretty credible. Remember that other weather mods such as my AssettoByNight tend to have a fixed (and optimistic) temperature coefficient which often lead to higher and unrealistic track temperatures. My recommendation is to chose carefully the compound, tyre pressure and also the AI level (do not pretend to drive to the limits on the Nordscleife at midnight, in a wet and cold winter night as you would do in a hot and dry Summer day).
    This mod is not a product. Consider it as a gift. I have no interest in "overselling" the features of the A4S so if I mislead you in someway, that was not my intention.
    This mod leverages on the middleware provided by Content Manager; this means that A4S feaures work within the limits set by CM. A4S is in development as well some required feaures provided by CM.
    1) A4S is a weather engine, meaning that each weather is created on the basis of the variables set by the user before the race. But it's not a Dynamic Weather Engine (PCx like); it is not and will never be. Weather conditions during the race are static.
    2) Weather conditions are set before the race and will be the same across all the sessions; this limitation comes from AC and I cannot do anything about it.
    3) A4S cannot be used in online mode.
    4) Currently smoke effects are disabled in favour of water effects (I'm investigating water effects performance issues). Soon you'll have the option to chose smoke or water effects.

Recent Reviews

  1. coolwhip21
    Version: 3.2
    Thanks for this marvelous edition to AC! Seems like a totally different sim.
  2. ClaudioWRC74
    Version: 3.2
    thank you for your work and all the updates, nice work
  3. Lucio Distilleri
    Lucio Distilleri
    Version: 3.0
    la mod funziona anche su oculus (anche se un po troppo satura x i colori sgargianti dell oculus), non selezionare openvr altrimenti i filtri non vanno
    suggerimenti: questa configurazione crasha http://prntscr.com/kfuwi0
    aggiungere un moltiplicatore saturazione e esposizione, per calibrare il proprio monitor senza modificare decine di parametri nei file lua
  4. nas404
    Version: 3.0
    very impressive
  5. Peter Kerényi
    Peter Kerényi
    Version: 2.2.1
    Excellent. Driving at night with the starts shining... wonderful. Nice weather engine as well that I need to experiment with more. Thank you :)
  6. Bonehead
    Version: 2.2.1
    Thank you very much!
  7. CobraCat
    Version: 2.0
    Stunning, excellent work! Thank you!
  8. jimclark06
    Version: 2.0
    absolutly amazing! this really change the game on a AC +. thank you very much! you did a awesome job!!
    1. fabrizio piedepesante
      Author's Response
      Glad you liked it.
  9. Lucio Distilleri
    Lucio Distilleri
    Version: 2.0
    for vr: -0.2 saturation, +0.2 brightness, -0.2 contrast
    1. fabrizio piedepesante
      Author's Response
      Lucio, I'll reply in English.
      You already downrated the mod 1 month ago because the "filters do not work in VR". At that time I understood the comment/rating because I had not made clear that VR was not supported (actually I had no idea of issues with VR). Anyway, I replied to you stating that "I do not have any means of testing the mod in VR" and I even put a disclaimer (in bold red) in the A4S overview page stating that I have no idea of how the mod will render in VR since it is not tested at all in such setup.
      Now, apparently you are still using this mod. If so, does it make sense to donwrate a mod because it does not work fine in a unsupported setup? I really do not understand it.
      Have you found a way to use it in VR? Fine! Open a thread in the forum and give the other users some useful tip.
      If you want to contribute to a VR version fo A4S you can open a conversation suggesting your settings. In any case you have to wait until I have a VR gear, or someone else develops a similar mod for VR.
  10. Costas.H
    Version: 2.0
    This is one of most beautiful mods i ever seen in AC! It is really works with dynamic lightening mod and you can run easily thought the night! The visuals are also great! Congratulations guys! Many thanks for this!
  11. themission2
    Version: 2.0
  12. Tzenamo
    Version: 2.0
    Is there any bug where tyre smoke isnt generated? It doesn't show any tyre's smoke with this mod.
    1. fabrizio piedepesante
      Author's Response
      It isn't really a bug, it is a temporary "dessign" choice. At this moment I use "smoke" effects for water effects. The problem is that FOR NOW I have to chosee one or the other, and since I'm investigating some issues (stuttering) with water effects, I chose the water over smoke for testing purposes. In the next release there will be two options: SMOKE_BUT_NO_WATER_EFFECTS and WATEREFFECTS_BUT_NO_SMOKE. In the future the options could be SMOKE_BUT_NO_WATER_EFFECTS WATEREFFECTS_AND_SMOKE.
      At the moment if you want to have back SMOKE (and get rid of water effects, performances will benefit as well) thre is a very easy way: go in each folder of the mod and remove the following files:
      - tyre_smoke.ini
      - tyre_smoke.lua
  13. esteady1
    Version: 1.0.1
    These visuals are unbelievable. Thank you for your efforts.

    Do you have a donation link?

    (You have already earned a donation, I will donate generously again if performance can be improved)

    Thank you!
    1. fabrizio piedepesante
      Author's Response
      Thank you, glad you liked it.
      No there isn't any donation link, I do not need your money.
      Save for AC Competizione ;-).
      Tomorrow I'll upload a new release, a significant step forward.
      It will bring Improvements in visuals in some specific scenarios along with something much more important...
  14. JJ72
    Version: 1.0.1
    I can hardly believe it is the same game at all
    1. fabrizio piedepesante
      Author's Response
      Thank you. Wait for next release, some interesting news is coming
  15. kelnor34
    Version: 1.0.1
    Really great job! Thx so much ;)
  16. englishpointer
    Version: 1.0
    Great mod, thanks for making it!
  17. francescods1976
    Version: 0.9.4
    Sembra perfetto ma come faccio a cambiare l’ora? La barra rimane su 8/18 anche se imposto una delle 4 stagioni... come faccio ad es a correre a mezzanotte o altro orario ??
    1. fabrizio piedepesante
      Author's Response
      Prima di tutto devi avere l'edizione completa di Content Manager (se la barra del tempo è fissa a 8/18 nel menu di gara allora credo tu abbia quella gratuita senza l'"extended time slidebar"). Se invece hai l'edizione completa ed il tuo problema è relativo ai campionati personalizzati, allora devi attendere perché CM ancora non supporta lo 0-24 nei campionati (vedi anche le FAQ).
  18. Nclsbrn89
    Version: 0.9.4
    nice job
    really immersive !!
  19. ShredatorFIN
    Version: 0.9.4
    Great job again! But after using this more, started to notice that during daytime, brake lights maybe reflect too much from the ground? Is this related to mod values, or the Shaders Patch? Can this be edited somehow? Imo the darker it gets, more brake lights would illuminate tarmac. But now feels a bit overdone in daytime. Backfires are slightly too bright too (imo) but not as much as brake lights
    1. fabrizio piedepesante
      Author's Response
      Yes I know, brakes light reflection on the ground are a bit annoying. It is due to the DL shader patch.
  20. HansDG
    Version: 0.9.3
    I couldn't believe it until I tried it. Totally fantastic! This was what Kunos should have done to finalize AC to v2.00 before moving on to AC Comp. Thank You!
    1. fabrizio piedepesante
      Author's Response
      Glad you like it.
      Coming release (0.9.4) will bring some functional and visual improvements plus a feature that I think it will be appreciated by those who love driving Formula cars in Nighttracks.
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