Hi.
Can you detail what "quality" level are you expecting ? "Beautiful" depends on your system specs.
I started a new Afcad/ADE for the airport a week ago, for massive fantasy AI traffic needs (like a fleet of 6 B1900 for CatovAir and one Saab 340B). Also planning VTP rework (coastlines, landclass and patches of VTP polygons), I need to figure out how to script default buildings generation. Maybe a few custom buildings, but I'm not planning on pro level quality, just for fun.
There is no ground polygon planned, no mesh, and the project was started on a basis of an FS9 export, then and FSX port (I don't own P3D nor MSFS). I just happenned to start learning the differences between FS9 techniques and compile which I know well, and FSX differences and extra options. I just happen to create my own way of building scenery with lines and polygons and reference points directly created in GoogleEarth. There is no limit I know of how many polygons I can create while being as accurate as what satellites photos are offering. Building an Afcad/ADE the size of Rodrigues is a matter of a couple hours for a quick KML to XML conversion (30 sec.) and FSX BGLComp with compile helper. The VTP part takes more time depending on how many details I want to add (roads, dirt/mud/forest/city patches/beach size...)
The bigger picture is all and everything in Madagascar and around (someting like 200 airfields/airstrips in the country, with islands like Agalega, Iles Eparses...). The only big scenery project I'm planning is Antananarivo/Ivato, and Rodrigues would be the 30th in my list of such big investment (after several malagasy airports improvements obviously).
How long it would take for my planned Rodrigues files to get on Avsim ? Well, there is no deadline, it will get released when ready (weeks, months, years ? that's just how it is, sorry). If what I'm plannong doesn't suits your needs, I hope someone else will get involved
. My priority is filling my fresh reset of FSX with massive AI, starting from my home country and around. Why no P3D plan ? Because I have a potato computer and that would not change anytime soon. That explains why I'm not interested in extremely detailed sceneries yet.
BTW, I noticed in the ADE I made there is no way to match runway aiming point bars (the big fat white rectangles markings where you're supposed to land) with the real thing. Default runway generation in FSX places them farther of the threshold, making the runway look like much shorter. And FS9 is not able to control PAPI 4 spacing between each light. Haven't checked in FSX yet, but I doubt I would be able either.
Last, there are probably other Rodrigues addons out there (Afcad/ADE or even custom scenery improvements), and some groups may have alredy reworked the Island a bit. Could be worth checking, but on my part, I believe no one except me would go the masochyst way of trying to match reality pixel perfect, even by using the default FS engine.