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Hi Mike, AccuSeason Advanced Edition is only for Microsoft Flight Simulator 2020. However we're in the research and evaluation phase for bringing something to 2024. Once we've confirmed a dev path, we’ll share updates with the community.

Atmos CORE Tech Update 1.0 Changelog: FIXED – Full compatibility with Microsoft Flight Simulator 2024 SU4. Resolved multiple integration points affected by SU4, including environmental data offsets, and API handshake behavior to ensure stable communication. FIXED – Custom weather rendering in METAR Mode. Addressed issues in the METAR parsing pipeline, including interpolation logic and fallback handling, preventing incomplete or partial scene generation. FIXED – Custom weather rendering in Simple Mode. Corrected slider-based parameter translation and rendering callbacks. FIXED – Custom weather rendering in Advanced Mode. Rebuilt several internal hooks responsible for multi-layer atmospheric rendering, improving fidelity and proper synchronization between volumetric clouds, and lighting. FIXED – Required description field preventing preset saving and edit function. Adjusted UI rules to allow preset persistence without unnecessary conditions. FIXED – UI validation preventing the Save button from enabling. Resolved conditional flag errors that interfered with save-state logic. FIXED – GetLocalSettingsRead() not reading local settings.json. Repaired the file read routine, corrected its directory resolution, and improved JSON parsing, ensuring user preferences load correctly at startup. FIXED – Spelling correction of “Enviro” in the save dialog box. Corrected text label. ADDED – Startup Log System for application process verification. Integrated a multi-stage logging pipeline that records initialization events, module load order, environment checks, and error flags. ADDED – Simulator Runtime Validation. Implemented a detection function to confirm whether Microsoft Flight Simulator is actively running. This ensures correct sequencing, prevents null-reference operations, and delivers safer startup behavior.

In the meantime, you can use the REX Atmos CORE beta version, which is operational until our team conducts our internal testing.

We're testing internally as with our core beta testers, all is well so far with the latest beta!

WONDERFUL to hear Rob!

The current SU4 beta build of Atmos CORE is working smoothly so far with the MSFS 2024 SU4 beta, but note that because this is a beta environment future MSFS beta updates may introduce changes requiring adjustments on our end. Also note that once SU4 is officially released, we will ensure full compatibility.

FYI, Update 4.0 now available for AccuSeason. https://rexsimulations.com/news.html

Great to hear Eric, thank you!

Hi Lars, we're testing this and we'll report back.

Yes, it still works with 2020, but we've been developing an update alongside the SU16 builds and are currently testing for full compatibility. We'll share an official update as soon as testing is complete.

Thanks for the feedback everyone. We completely understand how subjective visuals can be especially when comparing screenshots. What looks natural to one person may not appeal to another, and that's exactly why Atmos CORE gives users full control. The before/after images currently on our site is just a small peek. Much more information is coming as we near release. Atmos CORE is not a post-processing filter like ReShade, this distinction was thoroughly discussed when the original Atmos was first introduced for MSFS 2020. It's a deep integration that controls and enhances visual and atmospheric data at a core sim level, which goes beyond LUTs or post-processing overlays. As for MSFS 2024 it’s stunning out of the box no doubt. But many users still want a way to fine-tune things for personal aesthetic preferences. That’s where Atmos CORE shines. Regarding pricing, yes we’re planning a discount for existing Atmos customers. We agree it’s only fair especially for those who’ve supported us. Details will be shared soon. Atmos CORE isn’t just about visuals, it’s about control, customization, and community-shared environments.

The issue has been resolved. Thank you for your patience @jwhak

40% off all REX products. https://rexsimulations.com

Congrats Vincent, and thank YOU!

We don't sell in the Marketplace, and we're part of the Dev Alpha.