diff --git a/gfx/Larwick_Overmap/pngs_overmap_16x16/dirt_road/dirt_road.json b/gfx/Larwick_Overmap/pngs_overmap_16x16/dirt_road/dirt_road.json
index e39e28a490..d24ce9fbaf 100644
--- a/gfx/Larwick_Overmap/pngs_overmap_16x16/dirt_road/dirt_road.json
+++ b/gfx/Larwick_Overmap/pngs_overmap_16x16/dirt_road/dirt_road.json
@@ -1,4 +1,59 @@
 [
+  {
+    "id": [
+      "ants",
+      "ants_acid"
+    ],
+    "fg": "dirt_road_unconnected",
+    "multitile": true,
+    "additional_tiles": [
+      {
+        "id": "center",
+        "fg": "dirt_road_center"
+      },
+      {
+        "id": "corner",
+        "fg": [
+          "dirt_road_corner_nw",
+          "dirt_road_corner_sw",
+          "dirt_road_corner_se",
+          "dirt_road_corner_ne"
+        ]
+      },
+      {
+        "id": "t_connection",
+        "fg": [
+          "dirt_road_t_connection_n",
+          "dirt_road_t_connection_w",
+          "dirt_road_t_connection_s",
+          "dirt_road_t_connection_e"
+        ]
+      },
+      {
+        "id": "edge",
+        "fg": [
+          "dirt_road_edge_ns",
+          "dirt_road_edge_ew"
+        ]
+      },
+      {
+        "id": "end_piece",
+        "fg": [
+          "dirt_road_end_piece_n",
+          "dirt_road_end_piece_w",
+          "dirt_road_end_piece_s",
+          "dirt_road_end_piece_e"
+        ]
+      },
+      {
+        "id": "unconnected",
+        "fg": [
+          "dirt_road_unconnected",
+          "dirt_road_unconnected"
+        ]
+      }
+    ]
+  },
   {
     "id": [ "dirt_road", "dirt_road_forest", "rural_road", "rural_road_forest" ],
     "fg": [ "dirt_road_edge_ns", "dirt_road_edge_ew", "dirt_road_edge_ns", "dirt_road_edge_ew" ],
diff --git a/gfx/Larwick_Overmap/pngs_overmap_16x16/forest_trail/forest_trail.json b/gfx/Larwick_Overmap/pngs_overmap_16x16/forest_trail/forest_trail.json
index 08512ca719..561f0dbddb 100644
--- a/gfx/Larwick_Overmap/pngs_overmap_16x16/forest_trail/forest_trail.json
+++ b/gfx/Larwick_Overmap/pngs_overmap_16x16/forest_trail/forest_trail.json
@@ -1,5 +1,8 @@
 {
-  "id": "forest_trail",
+  "id": [
+    "forest_trail",
+    "sewer"
+  ],
   "fg": "forest_trail_unconnected",
   "multitile": true,
   "additional_tiles": [
diff --git a/gfx/Larwick_Overmap/pngs_overmap_16x16/go_overmap_terrain_hardcoded.json b/gfx/Larwick_Overmap/pngs_overmap_16x16/go_overmap_terrain_hardcoded.json
index 9636e8276d..450a62b89a 100644
--- a/gfx/Larwick_Overmap/pngs_overmap_16x16/go_overmap_terrain_hardcoded.json
+++ b/gfx/Larwick_Overmap/pngs_overmap_16x16/go_overmap_terrain_hardcoded.json
@@ -183,10 +183,6 @@
     "id": "anthill",
     "fg": "hive_brown"
   },
-  {
-    "id": "ants",
-    "fg": "pond_brown"
-  },
   {
     "id": "ants_food",
     "fg": "hive_red"