Resolved #13089 - better resource filter documentation

core/src/com/unciv/models/ruleset/tile/TileResource.kt

@@ -195,6 +195,7 @@ class TileResource : RulesetStatsObject(), GameResource {
     fun matchesSingleFilter(filter: String) = when (filter) {
         name -> true
         "any" -> true
+        "all" -> true
         resourceType.name -> true
         else -> improvementStats?.any { filter == it.key.name } == true
     }

docs/Modders/Unique-parameters.md

@@ -235,8 +235,12 @@ These can be strung together with ", " between them, for example: `+2 Production
 
 ## resourceFilter
 
-At the moment, only used for the `"Improves [resourceFilter] resource in this tile"` Unique on Improvements.
-Allows filtering resources by their name, their type, or by any Stat listed in their `improvementStats` property. The `all` keyword works too.
+Allowed values:
+
+- Resource name
+- `any`, `all`
+- Resource type: `Strategic`, `Luxury`, `Bonus`
+- Stat provided by the resource when improved (e.g. `Food`)
 
 ## stockpiledResource