Trying a new 'glowing moss' texture to sort out how to make the raycaster alter the light of a surface that has its own light.

map.hpp

@@ -60,7 +60,7 @@ public:
   Point map_to_camera(const Point &loc, const Point &cam_orig);
   Point center_camera(const Point &around, size_t view_x, size_t view_y);
 
-  void expand();
+  void enclose();
 
   void dump(int show_x=-1, int show_y=-1);
   bool INVARIANT();