diff --git a/src/main/resources/assets/carpet/scripts/overlay.sc b/src/main/resources/assets/carpet/scripts/overlay.sc
index 7bba815f..17e43e95 100644
--- a/src/main/resources/assets/carpet/scripts/overlay.sc
+++ b/src/main/resources/assets/carpet/scripts/overlay.sc
@@ -19,7 +19,12 @@ global_renderers = m(
         l('handler', '__shape_renderer'),
         l('tasks', m()),
         l('range', 8)
-    ))
+    )),
+    'portals' -> {
+        'active' -> false,
+        'handler' -> '__portal_renderer',
+        'tasks' -> {}
+    }
 );
 
 __command() -> '';
@@ -45,6 +50,10 @@ ruined_portal() -> __toggle('ruined_portal', 'structures');
 
 slime_chunks() -> __toggle('slime_chunks', 'chunks');
 
+portal_coordinates() -> __toggle('coords', 'portals');
+portal_links() -> __toggle('links', 'portals');
+
+
 
 clear() -> for(global_renderers, global_renderers:_:'tasks' = m() );
 
@@ -151,4 +160,121 @@ __chunk_renderer(player_name) ->
         )
     );
     schedule(10, '__chunk_renderer', player_name);
-)
\ No newline at end of file
+);
+
+__portal_renderer(player_name) ->
+(
+   l(p, config) = __should_run('portals', player_name);
+   if (!p, return());
+   dim = p~'dimension';
+   shapes = [];
+   shape_duration = 6;
+   ppos = pos(p);
+   py = ppos:1;
+   if (dim == 'overworld',
+      //
+      nether_pos = [ppos:0/8, py, ppos:2/8];
+      if (has(config:'tasks':'coords'),
+         ow_x = 8*floor(nether_pos:0);
+         ow_z = 8*floor(nether_pos:2);
+         for (range(-5,6), dx = _;
+            for (range(-5,6), dz = _;
+               x = ow_x + 8*dx;
+               z = ow_z + 8*dz;
+               nx = x / 8;
+               nz = z / 8;
+               shapes += ['line', shape_duration, 'from', [x,0,z], 'to', [x,255,z], 'line', 5];
+               shapes += ['box', shape_duration, 'from', [x,0,z], 'to', [x+8,255,z+8], 'color', 0x00000000, 'fill', 0xffffff05];
+               shapes += ['label', shape_duration, 'pos', [x+4, 1,z+4], 'text', [nx, floor(py), nz], 'follow', p, 'snap', 'y'];
+            )
+         );
+      );
+      if (has(config:'tasks':'links'),
+         in_dimension('the_nether',
+            portals = map(poi(nether_pos, 16, 'nether_portal', 'any', true), [x,y,z]=_:2; [[x,y,z], [8*x,y,8*z]]);
+            if (portals,
+               sorted_portals = __sort_portals(nether_pos, portals);
+               offset = p~'look' + [0,p~'eye_height',0];
+               for(sorted_portals,
+                  [pos, display] = _;
+                  color = if(_i, 0x00999999, 0x990099ff);
+                  to_rel = display-ppos;
+                  shapes += ['line', shape_duration, 'line', 5, 'from', [0,0.5,0], 'to', to_rel, 'color', color,'follow', p];
+
+                  to_dist = _euclidean([0,0,0],to_rel);
+                  if (to_dist > 3,
+                     direction = to_rel / to_dist;
+                     shapes += ['label', shape_duration, 'pos', [0,0.5,0]+(2+1*_i)*direction, 'text', pos, 'color', color, 'follow', p];
+                  )
+
+               )
+            )
+         )
+      );
+   , dim == 'the_nether',
+      look = query(p, 'trace', 10, 'blocks', 'exact');
+      if (look,
+         ly = look:1;
+         ow_pos = [8*look:0, look:1, 8*look:2];
+         nx = floor(8*look:0)/8;
+         nz = floor(8*look:2)/8;
+         shapes += ['box', shape_duration, 'from', [nx, ly-1, nz], 'to', [nx+0.125, ly+1, nz+0.125]];
+         if (has(config:'tasks':'coords'),
+            shapes += ['label', shape_duration, 'pos', look-ppos+[0,0.25,0], 'follow', p, 'text', map(ow_pos,floor(_))];
+         );
+
+         if (has(config:'tasks':'links'),
+            in_dimension('overworld',
+               portals = map(poi(ow_pos, 128, 'nether_portal', 'any', true), [x,y,z]=_:2; [[x,y,z], [x/8,y,z/8]]);
+               if (portals,
+                  sorted_portals = __sort_portals(ow_pos, portals);
+                  for(sorted_portals,
+                     [pos, display] = _;
+                     color = if(_i, 0x00999999, 0x990099ff);
+                     to_rel = display-ppos;
+                     shapes += ['line', shape_duration, 'line', 5, 'from', look-ppos+[0,1.0,0], 'to', to_rel, 'color', color, 'follow', p];
+
+                     to_dist = _euclidean([0,0,0],to_rel);
+                     if (to_dist > 3,
+                        direction = to_rel / to_dist;
+                        shapes += ['label', shape_duration, 'pos', look-ppos+[0,1.1,0]+(0.2+0.5*_i)*direction, 'text', pos, 'color', color, 'follow', p]
+                     );
+
+                  )
+               )
+            )
+         )
+      )
+   );
+   if (shapes, in_dimension(p, draw_shape(shapes)));
+   schedule(5, '__portal_renderer', player_name);
+);
+
+__sort_portals(ref_pos, portals) ->
+(
+   point_map = {};
+   for (portals, point_map:(_:0) = _:1);
+   sorted_portals = sort_key(keys(point_map), _euclidean_sq(ref_pos, _)+0.0001*(_:1));
+   output_locations = [];
+   seen_portals = {};
+   for (sorted_portals,
+      [x,y,z] = _;
+      if ( !has(seen_portals, [x,y+1,z]) && !has(seen_portals, [x,y-1,z]),
+         output_locations += _;
+      );
+      seen_portals += _;
+   );
+   base_portals = [];
+   seen_bases = {};
+   for (output_locations,
+      [x,y,z] = _;
+      while(has(seen_portals, [x,y,z]), 256, y += -1);
+      y += 1;
+      seen_bases += [x,y,z];
+      if (!has(seen_bases, [x-1,y,z]) && !has(seen_bases, [x+1,y,z])
+       && !has(seen_bases, [x,y,z-1]) && !has(seen_bases, [x,y,z+1]),
+         base_portals += [x,y,z];
+      )
+   );
+   map(base_portals, [_, point_map:_]);
+);
\ No newline at end of file