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REX Atmos
17 Reviews
MSFS2020 MSFS2024
3

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REX Atmos is a comprehensive visual enhancement utility for Microsoft Flight Simulator, providing real-time environment improvements from ground to sky. It features advanced customization options and an intuitive interface that allow users to tailor various visual parameters effortlessly. With compatibility across multiple weather engines and the ability to create and share unique weather scenarios, REX Atmos aims to elevate the overall flight simulation experience while preserving the integrity of the simulators core files.

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REX Simulations
About REX Simulations
Publisher on Flightsim.to

Enhance Your World!
REX Atmos is the ultimate visual enhancement utility for Microsoft Flight Simulator! Real-time, comprehensive environment enhancements from the ground to the sky. Compatible with everything, including REX products, ActiveSky, Asobo Live Weather, Saved Weather Presets, 
Imported Weather Presets and Saved Flights.

Overview
REX Atmos is a comprehensive visual enhancement utility that transforms your entire Microsoft Flight Simulator virtual world, from ground to sky. Featuring real-time rendering and full customization, this add-on lets you tailor the atmosphere, weather, and visuals like never before.

Advanced Controls
With advanced controls over visual parameters, you can create fully customizable and shareable experiences. Plus, with its intuitive, easy-to-use interface, anyone can harness the power of these features without worry.

Compatibility
Compatibility is never an issue, as REX Atmos works seamlessly with Asobo live weather, all weather engines (including REX Weather Force and ActiveSky), and weather presets. Best of all, it’s safe and non-destructive!

Simple & Easy to Use
Our intuitive interface puts simplicity first, letting you enhance your environment with just a few clicks. With a clean, organized layout, REX Atmos makes it effortless to create the perfect look. Dive in and elevate your simulation experience with ease.

Real-Time Rendering 
Enjoy instant feedback as you adjust parameters, with real-time rendering that updates your changes on the fly.

Complete Customization
From ground to sky, the level of control is unmatched, offering limitless possibilities for your flight sim visuals.

Ozone Function & Rayleigh Scattering
REX Atmos introduces an advanced ozone function for realistic atmospheric visuals, along with true Rayleigh scattering for stunning light effects that bring the sky and clouds to life.

Safe & Non-Destructive
REX Atmos is built to be non-destructive, preserving your simulator’s core files while you experiment with new visual experiences. When you exit REX Atmos or select RESET within the application, your simulator seamlessly reverts to its original state.

Visual Cloud Enhancement
REX Atmos addresses the occurrence of overly dark cloud coloring (commonly referred to by the community as “ash clouds”) within the simulator, replacing it with beautifully rendered, natural looking clouds that enhance the overall visual realism. You can customize this feature to your liking, just like all the other features in REX Atmos!

Weather Scenarios
Create fully customized weather environments and save your favorite setups and share them exclusively with other REX Atmos users. Once shared, your friends can join in, experiencing the exact same weather during their flights, adding a new level of multiplayer fun and immersion.

Compatibility
No matter if you’re using Asobo live weather, custom created weather, external weather engines like REX Weather Force or ActiveSky, or saved and imported weather presets, REX Atmos seamlessly integrates with your current setup.

Latest Update: 7.4.20250603 (June 04, 2025)
FIXED – Save preset where the OK and Cancel buttons remains greyed out. FIXED - User manual desktop link goes to dead URL. FIXED - Lighting under light elements not working.

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  • Requirements
  • Changelogs
  • Reviews
  • EULA
Requirements

  • Windows PC. This product is not supported on Xbox.

Flight Simulator:
Microsoft Flight Simulator 2020 / 40th Anniversary Edition

Windows Operating System:
Windows 10, Windows 11 

RAM Memory:
16GB or higher

Hard Drive Space:
10GB 

Minimum Graphics:
NVIDIA GTX 770 | AMD Radeon RX 570 

Internet Connection:
Required for installation, registration, and operation

Installation Method

Installer

Current Version

7.4.20250603 from June 04, 2025

Installation Size

115 MB

Download Size

84.34 MB

Changelogs

Update - 7.4.20250603 on June 04, 2025

FIXED – Save preset where the OK and Cancel buttons remains greyed out.
FIXED - User manual desktop link goes to dead URL.
FIXED - Lighting under light elements not working.

Update - 7.3.20250503 on May 09, 2025

REX ATMOS FOR 2020 – TECHNICAL UPDATE 2.0
FIXED – Crash to desktop issue during lengthy flights.
FIXED – Metar injection issue.
FIXED – Change values not showing in live weather.
FIXED – Tree color changes impacting AccuSeason tree colors.

Update - 7.2.20250212 on February 15, 2025

ADDED – Settings can be saved and restored to local drive.
ADDED – Values to all sliders.
ADDED – Ability to edit community presets and save changes.
ADDED – Ability to bookmark favorite presets.
ADDED – Ability to delete or load bookmarked presets.
ADDED – Ability to set a bookmarked preset to autoload.
ADDED – Function to autoload presets at start up.
ADDED – Autoload presets to show in Last Used Window.
REMOVED – Reference to REX Circle in settings window.

Initial File Release on September 28, 2024

3.4

17 Reviews

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17 Reviews
Yeaarz
2 months ago

One of the best upgrades and purchases for FS2020, it's so much better than the default. Get it.

Macalou
7 months ago

pas possible de telecharger sur windos

BaldoBi95
8 months ago

It's very improvemental, it enhance and overhauls a lot the graphics of the program, but It Eats a lot of VRAM and CPU.. even if my system have a Ryzen 9 5900X and a 3060 GPU, the game crashes in the middle of the flight and my PC reboot's... tried without the program, and it's all Ok... Need to be improved by some aspects.. 3 Stars for now

marciojet
8 months ago

It has improved a lot, the only flaw is that it is external, it should have a taskbar option

GnZa00
9 months ago

MUST HAVE, it can't get clearer than that.

JIN1001
11 months ago

Why does my ATMOS prompt 'License Key Issue' when it starts up

AARAVPILOT
11 months ago

nice quality

petergloor
1 years ago

Interesting fact for me is that the default values look better than anything else I tried.

Oliver.r
1 years ago

amazing, makes FS20 look great and good atmospherics like FS24

Fritz340
7 months ago

Rex Atmos is GREAT! The only thing that prevents 5 stars is that I have to apply the themes every time! Updated my rating! It now automatically applies your preset after opening the app!

MLD_Scenery
1 years ago

The app is doing it's thing, but like others, I would like to save one preset, and everytime I start the simulator, the app opens itself (like the Fenix app for example) an applies the saved or last used preset.

JetMore
1 years ago

Best mod to exist regarding graphics

stoomlok
1 years ago

REX Atmos..... The Home page keep on "initiating" mode and I can't manage to do anything. I don't understand how it to make working . Please help me!

Irvsax
1 years ago

I believe this product does do some nice scenic changes. However, the idea that every time you load it you have to manually load a preset on each catagory every time is ridiculous. If you want to use someone else’s preset you have to find it and load it every time you play the game. Makes it more bother than it’s worth and it’s pretty ridiculous this is a thing. I would avoid until they make it more easy to use.

bfalcao
1 years ago

Great start ! No more pixelated clouds and an amazing environment reality configuration tunning. Love it. But, still, several points to improve: " Fire and forget " approach. The app should start automatically when the MSFS starts, and should automatically load any default Environment/Weather/Atmosphere that we had previously selected. The idea is we don't need to think to activate it and manually select the themes that we had previously created. The same applies for updates. They should be fully automated and silent. The fact that it works with real weather was a deal breaker to buy it, for me.

Cazzie
1 years ago

Pretty intuitive, but like REX's Weather Force, the App has to be run simultaneously with the sim, unlike AccuSeason, where you set it and forget it, then close the App. Needs to be made as AccuSeason, set it and forget it, then close the App, like with REX's Global Airport Textures. For the time being save your money. I can highly recommend Global Airport Textures and AccuSeason, but forget Weather Force 2020 and REX Atmos.

stephaneflach
1 years ago

"I'm bluuuue dabedee dabedaaaa dabedeeee dabedaaaa...." Well if you like Eiffel 67, then buy this addon. Otherwise, save your money for anything else... ;-) Also like Saurer01 wrote, control window is too small and not scrollable, then lots of features are simply inaccessible...

End User License Agreements

REX Atmos is licensed to you by REX Simulations. By purchasing this item, you agree to their End User License Agreement.

END-USER LICENSE AGREEMENT FOR Real Environment Xtreme™ (REX Atmos) Enhancement Add-on for Microsoft’s Flight Simulator®

 

IMPORTANT — PLEASE READ CAREFULLY: This End-User License Agreement (“EULA”) is a legal agreement between you (either an individual or a single entity) and REX Game Studios, LLC. for the REX Atmos software product identified above, which includes computer software and includes associated media and “online” or electronic documentation (“SOFTWARE PRODUCT”). The SOFTWARE PRODUCT also includes any updates and supplements to the original SOFTWARE PRODUCT which may be provided to you by REX Game Studios. By accessing or otherwise using SOFTWARE PRODUCT, you agree to be bound by the terms of this EULA. If you do not agree to the terms of this EULA, do not use the SOFTWARE PRODUCT.

SOFTWARE PRODUCT LICENSE

SOFTWARE PRODUCT is protected by copyright laws and international copyright treaties, as well as other intellectual property laws and treaties. The SOFTWARE PRODUCT is sold as a single user license and no ownership is transferred, only the right to use the license software. The SOFTWARE PRODUCT may not be re-distributed, sold for non-profit or profit or subscription fees, repackaged, delivered on CD or DVD media or any other form of electronic media by any other persons or party, website, organization or entity, other than the official e-commerce seller website(s) as contracted or authorized by REX Game Studios.

 

1. GRANT OF LICENSE. This EULA grants you the following rights:

 

a. You may install, access, and run a SINGLE copy of the SOFTWARE PRODUCT on a SINGLE personal computer for your personal, non-commercial, non-profit use. Any party or organization seeking to use the SOFTWARE PRODUCT under license for commercial use should contact us at [email protected].

 

b. This SOFTWARE PRODUCT is for personal entertainment purposes only and may not be used for flight training purposes. This SOFTWARE PRODUCT is not part of an approved training program under the standards of any aviation regulatory agency or body worldwide, whether private or government.

 

c. Separation of Components. The SOFTWARE PRODUCT is licensed as a single product. Its original component parts created by REX Game Studios may not be separated for use for other software or projects.

 

d. Trademarks. This EULA does not grant you any rights in connection with any trademarks or service marks of REX Game Studios.

 

e. Rental. You may not rent, lease, or lend the SOFTWARE PRODUCT. You may not charge admission fees for any simulator, entertainment or training device which breaches this EULA by use of the SOFTWARE PRODUCT therein.

 

f. Support Services. This SOFTWARE PRODUCT is provided “as is”, however REX Game Studios will provide provision of support services in relation to the operation, installation or remedy of issues arising to the use of the SOFTWARE at its official support website at rexsimulations.com

 

g. Termination. Without prejudice to any other rights, REX Game Studios may terminate this EULA if you fail to comply with the terms and conditions of this EULA. In such an event, you must destroy all copies of the SOFTWARE PRODUCT and all its component parts.

 

2. COPYRIGHT. All title and copyrights in and to the original created components of the SOFTWARE PRODUCT (including but not limited to any images, photographs, animations, video, audio, music, and text incorporated into the SOFTWARE PRODUCT), the accompanying online documentation materials, and any copies of the SOFTWARE PRODUCT are owned by REX Game Studios or its suppliers. All title and intellectual property rights in and to additional third-party libraries and content (which are used under the terms of those components’ distribution) which may be accessed through use of the SOFTWARE PRODUCT is the property of the respective content owner and may be protected by applicable copyright or other intellectual property laws and treaties. This EULA grants you no rights to use such content. This SOFTWARE PRODUCT contains documentation which is provided only in electronic form, and you may print multiple copies of such electronic documentation.

 

3. LEGAL JURISDICTION. This EULA is governed by the laws of the United States.

 

4. LIMITATION OF LIABILITY. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL REX GAME STUDIOS BE LIABLE FOR ANY SPECIAL, INCIDENTAL, INDIRECT, OR CONSEQUENTIAL DAMAGES WHATSOEVER (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS, BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR ANY OTHER PECUNIARY LOSS) ARISING OUT OF THE USE OF OR INABILITY TO USE THE SOFTWARE PRODUCT OR THE PROVISION OF OR FAILURE TO PROVIDE SUPPORT SERVICES, EVEN IF REX GAME STUDIOS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

 

REX Atmos is a brand of REX Game Studios, LLC. 

 

Microsoft Flight Simulator is a © Copyrighted trademark of Microsoft Corporation

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