[Scripting Question] Start terrains based on map or terraintag (Solved)

[Sonicover]

So, the gen 8 project for essentials came with a feature in SWSH that starts one of the four terrains as soon as the battle begins if a specific weather is up in the overworld (I think it is storm and fog for electric and mystic terrain respectively)

I was wondering if it is possible to do de same but for entire maps without having to rely on weather, for example a gym having grassy terrain up all the time, or a forest or something but without using the weather so that is still free for something else.

Or if it is possible to assign them to terrain tags, so on land while the player is on a terrain tag 0 I have grassy terrain and while surfing since I'm on another terrain tag (7 I believe) having idk psychic terrain

Pretty sure is just having a call for the tags to check in which is the player standing but I have no idea how to do it, so any help would be appreciated

Edit: After tinkering with the scripts I found a way to check the environment and the terrain tag and call a terrain for that. So, if anyone is interesed

In

Overworld_BattleStarting

look for

if battleRules["defaultTerrain"].nil?
    if Settings::SWSH_FOG_IN_BATTLES
      case $game_screen.weather_type
      when :Storm
        battle.defaultTerrain = :Electric
      when :Fog
        battle.defaultTerrain = :Misty
      end
     else
      battle.defaultTerrain = battleRules["defaultTerrain"]
    end
  end

Wich should be arround line 110

Then, before the "else" add this:

case battle.environment = pbGetEnvironment
      when :Grass
        battle.defaultTerrain = :Electric
      when :TallGrass
        battle.defaultTerrain = :Psychic
      when :"Environment"
        battle.defaultTerrain = :"Your terrain ID"
      end

This code checks in what environment is the battle taking place and starts your terrain accordingly. I just put Electric and Psychic to test if the terrain changed

Now, if you want to have a terrain based of what terrain tag the player is standing, before this before else add this:

case $game_player.terrain_tag.id
      when :Sand
        battle.defaultTerrain = :Grassy
      when :"Terrain tag name"
        battle.defaultTerrain = :"Your terrain ID"
      end

This code checks the terrain tag and actives the terrain accordingly, same as before but since this are TerrainTagsID you can use them for having multiple terrains in one map depending on where the player is standing... although you can create a new environment and have it as the default environment for the tag and using only that, but it never hurts to have more options

If you decided to use both options (like i did for testing purposes) it should look like this:

if battleRules["defaultTerrain"].nil?
    if Settings::SWSH_FOG_IN_BATTLES
      case $game_screen.weather_type
      when :Storm
        battle.defaultTerrain = :Electric
      when :Fog
        battle.defaultTerrain = :Misty
      end
      case battle.environment = pbGetEnvironment
      when :Grass
        battle.defaultTerrain = :Electric
      when :TallGrass
        battle.defaultTerrain = :Psychic
      end
      case $game_player.terrain_tag.id
      when :Sand
        battle.defaultTerrain = :Grassy
      end
    else
      battle.defaultTerrain = battleRules["defaultTerrain"]
    end
end