• 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.

FSX Island showing as flat terrain

In my last airport project there is a small (but important) landmark island just offshore of the airport. The airport is on the coast.

I recreated the whole island in my project so that it has the correct shape. In real life this island is like a tall (cliff-like) rock that is about 5-10 meters above sea level. However, on FSX (even with the FSX MeSA mesh) the island shows as a flat piece of land which is unreal and quite boring.

What can I do to make this island as described above? I set the altitude of my island polygon (the one with the Landclass, evergreen or so) to 10 meters but that does not seem to make any difference.
Well, as I understand it, you have not created a terrain mesh for this island, right? If the elevation is not included in the default or any add-on files, there is no way anything will pop up from the water. You must create your own elevation scenery.

Create mesh scenery. It is all in SDK.... Use resample.exe, and your INF file should look something like this:

	Type		= Raw
	SourceDir	= "C:\Backup\Island"
	SourceFile	= "Terrain.raw"
	Layer		= Elevation
	nCols		= 1784
	nRows		= 948
	ULXMAP		= 177.02898592890725
	ULYMAP		= -17.606186958312737
	XDIM		= 7.063072853392e-6
	YDIM		= 6.751306945476e-6
	SamplingMethod	= Gaussian
	Scale		= 0.002
	SampleType	= UINT16

	DestDir			= "."
	DestBaseFileName	= "Island"
	UseSourceDimensions	= 1
	DestFileType		= BGL
	LOD			= 7,18
Last edited:
One thing I know is that you can use sbuilder to make the island and assign a height to the polygon. Then in Flight Simulator make sure your terrain mesh resolution slider is at least 5m or until you see the island elevation.


Resource contributor
Sorry I mixed up. It is FSX isn't it.
You need to draw exclusion around the island. The land will show up since in FSX world the whole world is land just cover with water. Then you draw the water to cover it and draw the island poly and make it a hole of the water you just draw. If you have mesh or make it by S-builder, it will show up.
Last edited:
Beautiful island man. I need to see where I can get free terrain data for my island or if not make it myself based on observations.