While messing around with the vegetation categories in the vegetation.db, I noticed that seven out of the eleven vegetation categories (namely "mangrove", "cactii", "long_grass", "reeds", "water_cover", "small_rocks" and "small_shrubs") were not working, despite having .vege_models assigned to them and sometimes (i.e in the case of "small_shrubs" for the "temperate_deciduous_forest" climate) having a percentage in the quantity of vegetation present in each climate.
I tried to get them to appear in the battle editor by changing elevations, adding water, changing ground textures but nothing changes. I also wrote the vegetation.db to .txt and found interesting stuff (I was notably wondering what those distribution maps were all about) but I didn't find any reason for why they should not work.
Would anyone happen to have info on this issue and how to fix it? It would really greatly add diversity to the battle maps, something I think medieval 2 rather needs.