• Which the release of FS2020 we see an explosition of activity on the forun and of course we are very happy to see this. But having all questions about FS2020 in one forum becomes a bit messy. So therefore we would like to ask you all to use the following guidelines when posting your questions:

    • Tag FS2020 specific questions with the MSFS2020 tag.
    • Questions about making 3D assets can be posted in the 3D asset design forum. Either post them in the subforum of the modelling tool you use or in the general forum if they are general.
    • Questions about aircraft design can be posted in the Aircraft design forum
    • Questions about airport design can be posted in the FS2020 airport design forum. Once airport development tools have been updated for FS2020 you can post tool speciifc questions in the subforums of those tools as well of course.
    • Questions about terrain design can be posted in the FS2020 terrain design forum.
    • Questions about SimConnect can be posted in the SimConnect forum.

    Any other question that is not specific to an aspect of development or tool can be posted in the General chat forum.

    By following these guidelines we make sure that the forums remain easy to read for everybody and also that the right people can find your post to answer it.

Mesh using rectangles & Polygons

Hi everyone,
I´m trying to "improve" one of the ugliest meshes that comes in MSFS in GCGM airport. If you´d fancy taking a look you´ll find all the challenges I´m facing....and I´m also explaining the approach I´ve taken to resolve some of the issues:
1) The biggest challenge was the sea in the cliff... it seemed a Tsunami, water was in the middle of the mountain originally. I´ve resolved it placing a polygon detailing the coast line with terraforming at 0m
2) The runway was a complete nightmare very hilly.... resolved using a rectangle with 0 fallout and using AIP charts profile
3) Just before both runway headings there are cliffs for around 20m. Resolved also with rectangle profile editor with 0 fallout and the width of the runway... but here starts the challenges
a) Rectangles only work in a single plane so, if your rectangle is in front of Rwy header , the whole line must have the same height at all points... so the depth of all the areas in front of the runway must be the same... and that´s not truth, as the real profile would be higher from the area coming from the mountain and lower on the area going to the sea....
b) Cars are floating in the air!!!! Is there any way of removing/excluding AI driven cars in some areas of the scenery?
c) MSFS while you´re flying around is moving up/down the areas that I´ve updated until it becomes stable.... so this makes me think I´m giving a hard time already with such amount of rectangles

The consequences of using this approach with rectangles can be seen in the second picture, the aspect of the mountains looks more a roof than a real hill coming down to the sea and you can observe even though I´ve extended the falloff distance by some big ammount of meters, it inmediately generates a cliff ....the only idea that comes to my mind to resolve it is splitting the current rectangles in many more... so it can be smoother, but I wonder then what will be the impact on the performance as I already have a lot of rectangles.

Any advice/suggestions are wellcome, comgining polygons as seen in the videos is not making the life easier neither...extending the fallout on the rectangles is almost anyway ignored by the system...

Thanks in advance



The MS-FS 3D world terrain infrastructure is oriented on the Earth's Cardinal N-S, E-W axes with a quad-based LOD tile system.

Thus, one will always see aliasing or "jagged" edges when using terrain resolutions displaying lower LODs for terrain quads.

There may also be issues with a mis-match of resolution (and thereby 'precision') of water bodies / shorelines with terrain mesh.

This is most likely seen because the MSFS 3D world elevation data for your project at GCGM has not yet been updated by Asobo.

You may wish to try using higher resolution LiDAR-derived elevation source data for the Canary Islands from Spain's GIS portal:

Digital Elevation Models​

New 2 meter Digital Terrain Model​

MDT02, the new elevation model.​

Use of higher resolution terrain data may facilitate creating more detailed MSFS terrain Vector Polygons / Raster Height Maps. :idea:

You may then implement a more accurate local terrain surface via MSFS Toolkit by Nool Aerosystems (posted by Paavo Pihelgas): :pushpin:

Last edited: