Freemeshx Global Terrain Mesh Scenery 2.0 -

Yes, and they complement each other beautifully.

FreeMeshX Global Terrain Mesh Scenery 2.0 (FMX 2.0) is a community-made global DEM (digital elevation model) replacement for flight simulators that increases terrain elevation detail worldwide (mountains, hills, valleys, shorelines). It replaces the simulator’s default low-res elevation with higher-resolution tiled heightmaps so scenery looks more realistic at all zoom/altitude levels. freemeshx global terrain mesh scenery 2.0

No, and you do not need it. MSFS streams its own mesh from Bing Maps at resolutions up to 3 meters globally. The default terrain in MSFS is superior to any offline mesh ever made for FSX/P3D. FreemeshX 2.0 is legacy software for legacy simulators. Yes, and they complement each other beautifully

If you fly primarily airliners at FL350 (35,000 feet), you might wonder if this matters. The answer is yes. Seeing the correct topography helps with situational awareness and makes the view out the window far more captivating. No, and you do not need it

However, this add-on is a must-have for VFR and bush pilots. Navigating by ground features relies on the landscape looking the way it does on a sectional chart. With FreeMeshX 2.0, that ridge you see on your map is actually there in the simulator, allowing for realistic low-level flying through mountain passes and valley streams.