diff --git a/data/mods/innawood/mapgen/cave.json b/data/mods/innawood/mapgen/cave.json
index 631a2646b2f43..cf4db3327bf23 100644
--- a/data/mods/innawood/mapgen/cave.json
+++ b/data/mods/innawood/mapgen/cave.json
@@ -33,14 +33,7 @@
         "          %|||%         "
       ],
       "flags": [ "ERASE_ALL_BEFORE_PLACING_TERRAIN" ],
-      "terrain": {
-        "|": "t_rock",
-        ",": "t_rock_floor",
-        "%": [ "t_rock", "t_region_groundcover_forest" ],
-        ";": "t_region_soil",
-        "<": "t_slope_down"
-      },
-      "furniture": {  }
+      "palettes": [ "cave_surface_palette" ]
     }
   },
   {
@@ -77,14 +70,7 @@
         "          %|||%         "
       ],
       "flags": [ "ERASE_ALL_BEFORE_PLACING_TERRAIN" ],
-      "terrain": {
-        "|": "t_rock",
-        "%": [ "t_rock", "t_region_groundcover_forest" ],
-        ";": "t_region_soil",
-        ",": "t_rock_floor",
-        "<": "t_slope_down"
-      },
-      "furniture": {  }
+      "palettes": [ "cave_surface_palette" ]
     }
   },
   {
@@ -121,15 +107,7 @@
         "          %|||%         "
       ],
       "flags": [ "ERASE_ALL_BEFORE_PLACING_TERRAIN" ],
-      "terrain": {
-        "|": "t_rock",
-        "%": [ "t_rock", "t_region_groundcover_forest" ],
-        ";": "t_region_soil",
-        ",": "t_rock_floor",
-        "W": "t_rock_floor",
-        "<": "t_slope_down"
-      },
-      "furniture": {  },
+      "palettes": [ "cave_surface_palette" ],
       "fields": { "W": { "field": "fd_web", "intensity": 2, "age": 10 } },
       "monsters": { "W": { "monster": "GROUP_SPIDER", "chance": 2, "density": 0.01 } }
     }
@@ -168,16 +146,8 @@
         "          %|||%         "
       ],
       "flags": [ "ERASE_ALL_BEFORE_PLACING_TERRAIN" ],
-      "terrain": {
-        "|": "t_rock",
-        "%": [ "t_rock", "t_region_groundcover_forest" ],
-        ";": "t_region_soil",
-        ",": "t_rock_floor",
-        "W": "t_rock_floor",
-        "<": "t_slope_down"
-      },
-      "fields": { "W": { "field": "fd_web", "intensity": 1, "age": 10 } },
-      "furniture": {  }
+      "palettes": [ "cave_surface_palette" ],
+      "fields": { "W": { "field": "fd_web", "intensity": 1, "age": 10 } }
     }
   },
   {
@@ -214,15 +184,7 @@
         "          %|||%         "
       ],
       "flags": [ "ERASE_ALL_BEFORE_PLACING_TERRAIN" ],
-      "terrain": {
-        "|": "t_rock",
-        "%": [ "t_rock", "t_region_groundcover_forest" ],
-        ";": "t_region_soil",
-        ",": "t_rock_floor",
-        "B": "t_rock_floor",
-        "<": "t_slope_down"
-      },
-      "furniture": {  },
+      "palettes": [ "cave_surface_palette" ],
       "monster": { "B": { "monster": "mon_bat" } }
     }
   },
@@ -260,16 +222,7 @@
         "          %|||%         "
       ],
       "flags": [ "ERASE_ALL_BEFORE_PLACING_TERRAIN" ],
-      "terrain": {
-        "|": "t_rock",
-        "%": [ "t_rock", "t_region_groundcover_forest" ],
-        ";": "t_region_soil",
-        ",": "t_rock_floor",
-        "B": "t_rock_floor",
-        "W": "t_rock_floor",
-        "<": "t_slope_down"
-      },
-      "furniture": {  },
+      "palettes": [ "cave_surface_palette" ],
       "fields": { "W": { "field": "fd_web", "intensity": 1, "age": 10 } },
       "monster": { "B": { "monster": "mon_bear" } }
     }
@@ -308,17 +261,8 @@
         "          %|||%         "
       ],
       "flags": [ "ERASE_ALL_BEFORE_PLACING_TERRAIN" ],
-      "terrain": {
-        "|": "t_rock",
-        "%": [ "t_rock", "t_region_groundcover_forest" ],
-        ";": "t_region_soil",
-        ",": "t_rock_floor",
-        "B": "t_rock_floor",
-        "W": "t_rock_floor",
-        "<": "t_slope_down"
-      },
-      "fields": { "W": { "field": "fd_web", "intensity": 1, "age": 10 } },
-      "furniture": {  }
+      "palettes": [ "cave_surface_palette" ],
+      "fields": { "W": { "field": "fd_web", "intensity": 1, "age": 10 } }
     }
   },
   {
@@ -355,16 +299,7 @@
         "          %|||%         "
       ],
       "flags": [ "ERASE_ALL_BEFORE_PLACING_TERRAIN" ],
-      "terrain": {
-        "|": "t_rock",
-        "%": [ "t_rock", "t_region_groundcover_forest" ],
-        ";": "t_region_soil",
-        ",": "t_rock_floor",
-        "B": "t_rock_floor",
-        "W": "t_rock_floor",
-        "<": "t_slope_down"
-      },
-      "furniture": {  },
+      "palettes": [ "cave_surface_palette" ],
       "fields": { "W": { "field": "fd_web", "intensity": 1, "age": 10 } },
       "monster": { "B": { "monster": "mon_cougar" } }
     }
@@ -404,17 +339,12 @@
         "                        "
       ],
       "flags": [ "ERASE_ALL_BEFORE_PLACING_TERRAIN" ],
+      "palettes": [ "cave_surface_palette" ],
       "terrain": {
-        "|": "t_rock",
-        "%": [ "t_rock", "t_region_groundcover_forest" ],
-        ";": "t_rock_floor_no_roof",
         "!": "t_rock_floor_no_roof",
         "?": "t_rock_floor_no_roof",
         "#": "t_rock_floor_no_roof",
         "~": "t_rock_floor_no_roof",
-        "@": "t_rock_floor",
-        ",": "t_rock_floor",
-        "q": "t_rock_floor",
         "R": "t_rock_floor_no_roof"
       },
       "furniture": { "R": [ [ "f_boulder_small", 1 ], [ "f_null", 10 ] ] },