The newly published roadmap gives users a clearer picture of where both atmospheric products are headed over the next several months and confirms that REX is continuing active development of both its current Atmos Core platform and the older Atmos Legacy product.
Technical Updates Coming in September
The first round of work is scheduled for September 2026.
REX says both Atmos Core and Atmos Legacy will receive technical updates during the month.
The roadmap does not provide a detailed breakdown of what those September technical releases will contain, so for now REX is keeping the specifics fairly close to the vest.
What is clear is that the September update is being treated separately from the larger feature releases planned for October and December.
That suggests the immediate focus will be on technical refinement before REX begins rolling out new functionality later in the year.
First Major Feature Update Arrives in October
The roadmap becomes more specific once it reaches the fourth quarter.
Feature Update 1 is scheduled for October and is expected to include:
- UI updates
- Fine-tuning functions
- Additional fixes
The addition of new fine-tuning controls could be particularly interesting for users who like to customize the atmosphere rather than simply load a preset and leave it alone.
Atmos products are built around manipulating the visual character of the simulator’s environment, so additional control over those settings could give users more flexibility in dialing in a particular look.
REX has not yet explained exactly which parameters will receive the new tuning functionality.
More details are expected as the October release gets closer.
Automatic Transitory Preset Scenes Coming in December
The most intriguing item on the roadmap arrives in December.
REX plans to release Feature Update 2, which will introduce the first phase of what the company calls:
Automatic Transitory Preset Scenes
That feature appears to be the headline addition for the end of the year.
REX has not yet provided a detailed explanation of how Automatic Transitory Preset Scenes will work, but the wording strongly suggests Atmos will begin gaining the ability to transition automatically between different visual presets or atmospheric states rather than requiring users to manually switch them.
Because REX specifically labels the December release as Phase 1, the feature also appears likely to expand beyond its initial implementation.
For Atmos users, this could become one of the more significant changes to the product because automatic scene transitions could make the atmosphere feel more dynamic during longer flights.
Atmos Core and Atmos Legacy Both Remain in Development
Another important takeaway from the roadmap is that Atmos Legacy is still receiving active support alongside Atmos Core.
REX is not limiting the upcoming work exclusively to its newer MSFS 2024-focused product.
The September technical release is specifically identified as applying to both products.
That should be welcome news for users who continue flying with REX Atmos Legacy in Microsoft Flight Simulator 2020.
The roadmap itself is labeled:
REX Atmos Development Roadmap for 2026
and identifies both REX Atmos Core and REX Atmos Legacy at the top.
A Busy Final Quarter for REX
The schedule gives REX three distinct development milestones before the year is over.
September brings the technical release.
October delivers the first major feature update.
December introduces the second feature update and the first phase of Automatic Transitory Preset Scenes.
That creates a fairly steady update cadence through the remainder of 2026 rather than one large end-of-year release.
It also suggests REX plans to use the September technical work as a foundation for the more substantial feature additions that follow.
REX Is Keeping Some Details for Later
For now, the roadmap is deliberately high level.
REX says it looks forward to sharing more information over time, so we still do not know exactly how extensive the UI changes will be, what the fine-tuning controls will cover, or how Automatic Transitory Preset Scenes will behave in practice.
Those details will likely determine how significant the October and December updates ultimately become.
But the roadmap provides enough information to confirm that Atmos development is far from finished.
What Atmos Users Can Expect Next
For REX Atmos users, the rest of 2026 now looks like this:
September: Technical updates for Atmos Core and Atmos Legacy.
October: Feature Update 1 with UI improvements, fine-tuning functions and additional fixes.
December: Feature Update 2 with Automatic Transitory Preset Scenes, Phase 1.
That final feature is the one worth watching most closely.
If REX can make atmospheric presets evolve automatically during a flight rather than behaving as static visual configurations, Atmos could begin moving toward a much more dynamic environmental system.
For now, REX has given users the roadmap.
Next comes finding out exactly what is hiding behind those December clouds.
