I am using reshade to disable green roads. Here is my settings in action: https://www.youtube.com/watch?v=6eebPKho-3Y&lc=Ugys-U9lN5a87AAeRvZ4AaABAg

And here is my settings with screenshot: https://i.postimg.cc/S4DJQkHG/MSFS-2020-reshade-settings.jpg

Instructions:

1) https://reshade.me/ 

2) Install

a. select msfs2020.exe

b. Select only these packages ”Legacy standard effects” and all effects from that package

c. Move file (in this zip) MSFS2020_HDR_SHARP_DISABLE_GREEN.ini to same folder where msfs2020.exe is

3) Open sim

a. HOME key is Reshade´s toggle -key, with that key you are able to edit you settings

b.put there some key bind to "activate reshade settings"  i have it with CTRL+HOME. With that key combination, you can test you settings easily.

4) Pick that MSFS2020_HDR_SHARP_DISABLE_GREEN.in file

5) Choose effects (these should be ready bacause of that selected .ini)

a. AdaptiveSharpen (littlebit sharpening, value 0.15 is ok)

b. MagicHDR (this makes sim world alive, but not too much od HDR magic)

c. PD80_04_Selective_Color (with this you can make roads less green, but there is downside... also trees isnt so green anymore. This settings decreases green colors everywhere)

6) You can modify those setting values so much you want, and you can disable reshade by deleting these is that folder, where msfs2020.exe is:  folder reshade-shaders and files dxgi.dll, dxgi.txt, ReShade.ini and MSFS2020_HDR_SHARP_DISABLE_GREEN.ini.

Update. This might not work with microsoft store version: https://reshade.me/forum/general-discussion/5640-is-it-possible-to-reshade-uwp-games  but there is workaround:

Tool using Crosire's reshade injector (inject64.exe) that
1. Get's the UWP / Game Pass PC game's metadata
2. Generates a bat file to launch it
3. Downloads all Reshade FX files and generates a proper INI

Anyways, the program is here: github.com/MilkyDeveloper/ReshadeForUWP and it has a full GUI.