Started working on real wall textures, but not suitable for a tilesheet right now unfortunately

prefabs/combat_map.tscn

@@ -6,6 +6,7 @@
 [ext_resource type="Script" uid="uid://cxl38x2m6sj3w" path="res://scripts/battle/grid_overlay.gd" id="4_jelju"]
 [ext_resource type="Texture2D" uid="uid://b1ks72fiesfrm" path="res://assets/sprites/combat_map_ui.BMP" id="5_mycp7"]
 [ext_resource type="Texture2D" uid="uid://65rmoynep5hy" path="res://assets/sprites/MP000A.BMP" id="6_muxvo"]
+[ext_resource type="Texture2D" uid="uid://b20mhn7ca5xyo" path="res://assets/sprites/aux_terrain.BMP" id="7_mycp7"]
 
 [sub_resource type="Resource" id="Resource_vcj5e"]
 script = ExtResource("2_8rn0j")
@@ -65,6 +66,160 @@ texture_region_size = Vector2i(100, 100)
 tile_size = Vector2i(100, 100)
 sources/0 = SubResource("TileSetAtlasSource_mycp7")
 
+[sub_resource type="TileSetAtlasSource" id="TileSetAtlasSource_e2u25"]
+texture = ExtResource("7_mycp7")
+texture_region_size = Vector2i(50, 50)
+0:0/0 = 0
+1:0/0 = 0
+2:0/0 = 0
+3:0/0 = 0
+4:0/0 = 0
+5:0/0 = 0
+6:0/0 = 0
+7:0/0 = 0
+8:0/0 = 0
+0:1/0 = 0
+1:1/0 = 0
+0:2/0 = 0
+0:3/0 = 0
+3:3/0 = 0
+4:3/0 = 0
+5:3/0 = 0
+6:3/0 = 0
+7:3/0 = 0
+8:3/0 = 0
+0:4/0 = 0
+3:4/0 = 0
+4:4/0 = 0
+5:4/0 = 0
+6:4/0 = 0
+7:4/0 = 0
+8:4/0 = 0
+0:5/0 = 0
+3:5/0 = 0
+4:5/0 = 0
+5:5/0 = 0
+6:5/0 = 0
+7:5/0 = 0
+8:5/0 = 0
+0:6/0 = 0
+3:6/0 = 0
+4:6/0 = 0
+5:6/0 = 0
+6:6/0 = 0
+7:6/0 = 0
+8:6/0 = 0
+0:7/0 = 0
+3:7/0 = 0
+4:7/0 = 0
+5:7/0 = 0
+6:7/0 = 0
+7:7/0 = 0
+8:7/0 = 0
+0:8/0 = 0
+3:8/0 = 0
+4:8/0 = 0
+5:8/0 = 0
+6:8/0 = 0
+7:8/0 = 0
+8:8/0 = 0
+0:9/0 = 0
+3:9/0 = 0
+4:9/0 = 0
+5:9/0 = 0
+6:9/0 = 0
+7:9/0 = 0
+8:9/0 = 0
+0:10/0 = 0
+0:11/0 = 0
+4:11/0 = 0
+0:12/0 = 0
+1:12/0 = 0
+2:12/0 = 0
+3:12/0 = 0
+4:12/0 = 0
+5:12/0 = 0
+6:12/0 = 0
+7:12/0 = 0
+8:12/0 = 0
+0:13/0 = 0
+1:13/0 = 0
+2:13/0 = 0
+3:13/0 = 0
+4:13/0 = 0
+5:13/0 = 0
+6:13/0 = 0
+0:14/0 = 0
+1:14/0 = 0
+2:14/0 = 0
+3:14/0 = 0
+4:14/0 = 0
+5:14/0 = 0
+6:14/0 = 0
+0:15/0 = 0
+1:15/0 = 0
+2:15/0 = 0
+3:15/0 = 0
+4:15/0 = 0
+5:15/0 = 0
+6:15/0 = 0
+0:16/0 = 0
+1:16/0 = 0
+2:16/0 = 0
+3:16/0 = 0
+4:16/0 = 0
+5:16/0 = 0
+6:16/0 = 0
+4:1/0 = 0
+3:1/0 = 0
+2:1/0 = 0
+5:1/0 = 0
+1:2/0 = 0
+2:2/0 = 0
+3:2/0 = 0
+4:2/0 = 0
+5:2/0 = 0
+6:2/0 = 0
+7:2/0 = 0
+8:2/0 = 0
+8:1/0 = 0
+7:1/0 = 0
+6:1/0 = 0
+1:3/0 = 0
+2:3/0 = 0
+1:4/0 = 0
+2:4/0 = 0
+1:5/0 = 0
+2:5/0 = 0
+1:6/0 = 0
+2:6/0 = 0
+1:7/0 = 0
+2:7/0 = 0
+1:8/0 = 0
+2:8/0 = 0
+1:9/0 = 0
+2:9/0 = 0
+1:10/0 = 0
+2:10/0 = 0
+3:10/0 = 0
+4:10/0 = 0
+5:10/0 = 0
+7:10/0 = 0
+8:10/0 = 0
+1:11/0 = 0
+2:11/0 = 0
+3:11/0 = 0
+5:11/0 = 0
+6:11/0 = 0
+7:11/0 = 0
+8:11/0 = 0
+7:13/0 = 0
+8:13/0 = 0
+
+[sub_resource type="TileSet" id="TileSet_0i5hg"]
+tile_size = Vector2i(50, 50)
+sources/0 = SubResource("TileSetAtlasSource_e2u25")
+
 [node name="CombatMap" type="Node2D" unique_id=546780706]
 script = ExtResource("1_jyv1f")
 tile_set = SubResource("Resource_vcj5e")
@@ -83,3 +238,6 @@ offset = Vector2(50, 50)
 [node name="TerrainLayer" type="TileMapLayer" parent="." unique_id=1201875024]
 unique_name_in_owner = true
 tile_set = SubResource("TileSet_e2u25")
+
+[node name="WallLayer" type="TileMapLayer" parent="." unique_id=1956876936]
+tile_set = SubResource("TileSet_0i5hg")