WorldView: make rendering of hex tile borders optional.

scenes/WorldView.cs

@@ -13,6 +13,7 @@ public class WorldView : Spatial
     // exports
     [Export] public NodePath World;
     [Export] public Vector2 ViewCenterPlaneCoord;
+    [Export] public bool ShowHexTiles = false;    
 
     // signals
     [Signal]
@@ -147,6 +148,16 @@ public class WorldView : Spatial
             }
 
             sceneTileChunk.ChunkIndex = chunkIndex;
+
+            if (ShowHexTiles)
+            {
+                foreach (HexTile3D tile3D in sceneTileChunk.TileNodes)
+                {
+                    tile3D.Transform = new Transform(Basis.Identity.Scaled(Vector3.One * 0.95f),
+                        tile3D.Transform.origin);
+                }
+            }
+            
             _sceneTileChunks.Add(sceneTileChunk);
         }