terrainFilter now accommodates nationFilter for owner

core/src/com/unciv/logic/map/tile/Tile.kt

@@ -535,9 +535,11 @@ open class Tile : IsPartOfGameInfoSerialization {
             "Natural Wonder" -> naturalWonder != null
             "Featureless" -> terrainFeatures.isEmpty()
             Constants.freshWaterFilter -> isAdjacentTo(Constants.freshWater)
+
+            in terrainFeatures -> true
             else -> {
-                if (terrainFeatures.contains(filter)) return true
                 if (terrainUniqueMap.getUniques(filter).any()) return true
+                if (getOwner()?.nation?.matchesFilter(filter) == true) return true
 
                 // Resource type check is last - cannot succeed if no resource here
                 if (resource == null) return false

docs/Modders/Unique-parameters.md

@@ -61,7 +61,7 @@ Allows filtering for specific nations.
 - `City-states`
 - `Major`
 - Nation name
-- Nation unique
+- A unique a Nation has (verbatim, no placeholders)
 
 ## cityFilter
 
@@ -96,15 +96,6 @@ Allowed values are:
 -   `Great Improvements`, `Great`
 -   `All Road` - for Roads & Railroads
 
-## nationFilter
-
-Allowed values are:
-
-- `All`
-- `Major`
-- `CityState`
-- The name of a Nation
-- A unique a Nation has (verbatim, no placeholders)
 
 ## mapUnitFilter
 
@@ -176,6 +167,7 @@ This indicates the terrain on a single tile. The following values are allowed:
     - Terrain feature uniques
     - Resource
     - Natural wonder
+    - A [nationFilter](#nationfilter) matching the tile owner
 -   Or the filter is a constant string choosing a derived test:
     -   `All`
     -   `Water`, `Land`