REX 5 - Sky Force 3D

As part of the REX 5 family of products, Sky Force 3D is a complete overhaul of the weather and environment experience, bringing realism and dimension to Prepar3D v1, 2, 3 and 4+, FSX and FSX Steam.

Serial key is valid for Prepar3D v4+ (64bit) and Prepar3D v1, 2, 3, FSX and FSX Steam (32bit).

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"REX has a habit of reinventing one's flight sim experience and with Sky Force 3D they’ve once again pushed the boundaries to the limit." 
– Jessica Bannister-Pearce, PC Pilot Magazine

Owners of previous REX product(s) automatically receive 15% off! To receive this discount, you must purchase Sky Force where you originally purchased your other REX product(s).

Sky Force 3D is a complete overhaul of the weather and environment experience, bringing realism and dimension to Prepar3D v1, 2, 3 and 4+, FSX and FSX Steam.

• Restructured Cloud SDK for True Formation Realism

3000+ New Realistic 3D Cloud Models and Structures Based on Real-World Cloud Classification

• Dynamic Synchronization

• New Cloud SDK (No more upside-down clouds or repeating cloud bottoms)

• Natural Photo-Based Environment Textures

• Weather Engine

• Integrated Flight Center

• Interactive Mapping System

• Built-in PTA Integration

• Innovative Sky and Sun Atmospherics

• New Lightning Effects

• New HD Environment Sound Effects

• All Packaged in a 4.6GB Download, Expandable to Nearly 20GB

• Compatible With All Weather Engines and Environment Products

• and Much More!



3000+ New Realistic 3D Cloud Models and Cloud Structures

3000+ new 3D cloud model structures and SDK, patterned after real-world cloud classifications with their own specifications, positions and heights. 

Clouds types, including; altocumulus, stratocumulus, humilis, mediocris, congestus, tower cumulus, cumulonimbus calvus, supercell and rainshaft, tornado, stratus, nimbostratus, altostratus and cirrus class. Real-world cloud model system including (but not limited to) cloud streets, super cells, wall clouds, funnel, shelf, rain shaft and tornadoes.

Restructured cloud SDK for true formation realism. No more upside-down clouds in bizarre and unrealistic positions, or cloud bases that are presented with repeating patterns.

Single-session cloud texture variation, allowing more variety during a flight session, increasing the overall realism.

The new cloud system models storm structures reaching 70,000 feet. We also modeled the base of our storm clouds and added rain shafts to calvus and incus cumulonimbus clouds of various intensities, adding to the realism. Also included are wall and shelf clouds, and in some circumstances, these will include funnel clouds and tornadoes of various shapes and sizes.


Real-Time Weather Engine

The weather engine harnesses over 70,000 points of weather data globally, and reads & interprets live model data to sample the atmosphere and therefore will sync the appropriate clouds structures, allowing for more accuracy.

Using the weather engine is as simple as opening Sky Force and the simulator. That's it, everything is done automatically without the fuss.


NEW Photo-Based Natural Environment Textures and Innovative Sky Atmospheric Effects (20GB)

Fully DX9, DX10 and DX11 compliant. Tailored to low AND high-end systems.

Elevate this new visual experience through our new natural, photo-based environment textures while exploiting the power of PTA integration (The PTA tool add-on is not a requirement).

Smoother, more realistic and natural sky color blending at dawn and dusk as well as newly improved visibility and fog. With VBlend and Vaporous Skies, we have achieved more realistic horizontal and vertical day, dawn and dusk fog generation and sky visibility blending.

The sun atmospheric rendering effects are cinematic and will be noticeable through the virtual cockpit, creating even more realism. Sun atmospheric rendering coupled with HDR elements included for use in Prepar3D v3 and v4+.

Full 10-Day Cycle Sky Texture Sets

Included is our unique 10-day cycle sky textures category. When the 10-Day Cycle is installed, the simulator will dynamically load a different sky color transition from sunrise through sunset each day within the sim.

Lightning Fast Texture Installation.

Installing a full suite of textures into the simulator is lightning fast. You also have the ability to select and install textures individually and/or create custom 'themes' to install a full suite of textures instantly.


PTA Presets Built-In

The PTA presets included in Sky Force 3D were specifically designed for use with the sky textures and atmospheric effects in Sky Force 3D. The Prepar3D Tweak Assistant (PTA) is required for use with our presets, but not necessary for normal use.

Included are sample videos within the application showing exactly what the PTA preset/texture combinations look like in Prepar3D. We have taken the guess work out of the equation, and presented you with a full atmospheric representation ranging from sunrise through sunset.

We went through great lengths to maintain ease-of-use for our customers. PTA integration is a one-click install and all supporting textures, as well as the PTA preset are installed automatically.


New 3D Cloud Synchronization Process for In-Sim Updates

Synchronization technology which dynamically syncs 3D cloud model structures in real-time during flight. 


Flight Center

Our Flight Center is a no-nonsense tool that is geared for those who want to view their flight plans and experience true weather along a route.

Supports the standard XML based plan file from FSX and Prepar3D. Importing a flight plan is extremely simple.

You can even download a community shared flight plan directly from inside Sky Force from our vast community base.

While using Sky Force you are immediately in contact with an enormous user base in which to share your flight plans or download another person’s flight plan.

Uploading your flight plan(s) to the Sky Force community is as easy as one click.


Interactive Mapping System

Integrated interactive mapping system provides 9 weather overlays to allow you to visually sample the weather prior to departure.

   Precipitation Overlay – Just like the weather syncs systems of today, you can view all the locations of precipitation. 

   Winds Overlay – 9 levels of wind from 3,000 to 53,000 feet can be viewed in this overlay.

   Temps Overlay – 9 levels of temperatures from 3,000 to 53,000 feet.

   Pireps Overlay – Read position and data from real-life pilots across the world.

   Sigmets Overlay – Provides not only US-based but global sigmet data in real-time.

   Metar Overlay – Utilizing that fact that our servers download the local weather data 6 times an hour gives you the most accurate view of the local weather.

   Flight Plan Overlay – If you import a flight plan into the Sky Force Flight Center, then a visual view of the flight plan is available.

   Major Airport Overlay – Provides a vital point of reference to help you as you fly.

   Major Road Overlay – To give more detail and help especially to the pilots who like to fly VFR, we provide a significant road overlay to follow.

   Zoom Feature – Zoom into the local level and zoom out to the regional level.

   Precip Opacity – Reduce the prominence of the precipitation echoes for simple viewing.


Shared Community Environmental Themes

Feeling uninspired and just want to try something new? Filter through various uploaded environment themes to try out. For ease, we have provided the means for many of these themes to be categorized based on several weather conditions. All environmental texture themes are categorized based on how a user thinks the theme appears in the simulator, such as fair, foggy, rainy and snowy weather, dust and thunderstorms etc.

Sky Force continues to expand the tradition of providing a connected “Shared Community” within its products. Similarly, to our Shared Community Flight Plans, you can also share your environment creations within the program!

After you create an Environment Theme, you have the option to use our REX EDGE servers to pass on your theme to the rest of the Sky Force community.


Never Miss an Update!

The built-in Auto Update allows REX Game Studios to quickly, effectively and effortlessly deliver periodic and crucial updates to our customers.




No refund, credit or replacement of any kind is available for download products. It is your responsibility to transfer your purchased download products from our servers to your computer. Considering the technical nature of the internet, REX Game Studios will make every effort to resolve any issues you may have while attempting to download your products to ensure successful delivery.



Prepar3D v1, 2, 3, 4+
FSX Steam Edition




Windows Operating System:
Windows Vista SP 2 or higher

RAM Memory:
4GB or higher

Hard Drive Space:

Video Card:
DirectX 9 or higher

Internet Connection:
Required for installation, registration and operation

.net Framework 4.5 (included with installation)

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