Only a very quick look: The new terrain on terrasync seems (??) to have a significantly reduced amount of the landclass types textured with yellow-green and light green (grass & small plants, moss AIUI). It's a common landtype/colour in Icelandic landscapes AIUI. Have not flown in FG since last time, only a quick check with UFO. Maybe someone more familiar with Iceland in FG can verify.
Isafjordur (BIIS) - summer in FG: Old:
1,
2. New:
3,
4. Google maps:
5.
Vik (BIVI) - summer: Old:
6,
7,
8,
9 New:
10. Google (autumn-ish):
11, greener at other seasons:
12. If the landclass is right FG handles seasonal change so greenery will change colour later.
Grass/plant landclass patch near BIVI: Google:
13, Old:
14, New:
15,
16. Landtype with brighter green textures on ground & hill seems to match in old version. Roadsides in Iceland often have an introduced species spread by commuters growing aiui - the purple flowering Alaskan Lupine.
Not sure if this is a known thing, or a quirk of a new data source. Just something I noticed. Maybe many landclasses get mapped to 1 in new data, or to new landclass types that get a generic fallback (?). There is the odd patch of the reduced landtypes. Maybe reduction is just in some areas. Just mentioning in case it's a bug, or something with a regional definitions workaround.
Kind regards,
vnts