update

config/terrain_movement.yaml

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+# Terrain movement rules, passability and costs configuration
+# All gameplay values and parameters are fully configurable.
+
+# Classification thresholds
+water_height_threshold: 6            # Raw heightmap elevation value (< 6 is water)
+mountain_rock_height_km: 2.3        # Height in km >= 2.3 is rocky mountain
+snow_height_km: 3.1                 # Altitude in km >= 3.1 is high peak snow
+polar_snow_line_enabled: true       # Whether latitude reduces snowline altitude
+polar_snow_line_base_km: 2.5        # Base snowline at temperate latitudes
+polar_snow_factor_start: 0.40       # Latitude distFromCenter where polar cooling starts
+polar_snow_factor_end: 0.85         # Latitude distFromCenter where sea-level snowline is reached
+
+# Movement costs per terrain type (1.0 = normal base cost, higher values = slower traversal)
+movement_costs:
+  grasland: 1.0
+  bos: 2.0
+  steen: 2.5
+  sahara: 1.5
+  tundra: 1.5
+  red_canyon: 2.0
+  sneeuw: 3.0
+  water: 1.0
+
+# Movement domains:
+# - land: standard ground units (settler, builder, warrior, slinger, etc.)
+#   impassable_terrains: list of terrain types land units CANNOT enter or cross.
+# - naval: ships and sea vessels (galley, etc.)
+#   passable_terrains: ships can ONLY move on these terrains (water).
+domains:
+  land:
+    impassable_terrains:
+      - water
+      - sneeuw
+  naval:
+    passable_terrains:
+      - water