diff --git a/celldrawer.cpp b/celldrawer.cpp
index 7f6dce43..97b44aa9 100644
--- a/celldrawer.cpp
+++ b/celldrawer.cpp
@@ -1930,6 +1930,8 @@ void celldrawer::check_rotations() {
     }
   }
 
+EX bool debug_tiles;
+
 void celldrawer::bookkeeping() {
   bool orig = false;
   if(!inmirrorcount) {
@@ -2021,6 +2023,15 @@ void celldrawer::draw_cellstat() {
     string label = its(c->landparam);
     queuestr(V, 1 * .2, label, 0xFFFFFFFF, 1);
     }
+
+  if(debug_tiles) {
+    string label = its(shvid(c));
+    queuestr(V, .5, label, 0xFFFFFFFF, 1);
+    for(int i=0; i<c->type; i++) {
+      queuestr(V * rgpushxto0(currentmap->get_corner(c, i, 4)), .2, its(i), 0xFFFFFFFF, 1);
+      queuestr(V * rgpushxto0(mid(currentmap->get_corner(c, i, 4), currentmap->get_corner(c, i+1, 5))), .2, its(i), 0xFFFFFFFF, 1);
+      }
+    }
     
   if(cmode & sm::TORUSCONFIG) {
     auto p = euc::coord_display(V, c);
diff --git a/config.cpp b/config.cpp
index 943beffb..130cdf84 100644
--- a/config.cpp
+++ b/config.cpp
@@ -2440,6 +2440,7 @@ EX int config3 = addHook(hooks_configfile, 100, [] {
     ->set_reaction([] {
       if(vid.highdetail > vid.middetail) vid.highdetail = vid.middetail;
       });
+  param_b(debug_tiles, "debug_tiles");
   addsaver(vid.gp_autoscale_heights, "3D Goldberg autoscaling", true);  
   });