diff --git a/graphics/rm_Overlay.png b/graphics/rm_Overlay.png
deleted file mode 100644
index e9b4dc3..0000000
Binary files a/graphics/rm_Overlay.png and /dev/null differ
diff --git a/prototypes/prototypes.lua b/prototypes/prototypes.lua
index 68c9a6b..d88cc1c 100644
--- a/prototypes/prototypes.lua
+++ b/prototypes/prototypes.lua
@@ -43,31 +43,6 @@ data:extend(
             },
         },
 
-        {
-            type = 'container',
-            name = 'rm_overlay',
-            flags = { 'placeable-neutral', 'player-creation', 'not-repairable' },
-            icon = '__YARM__/graphics/rm_Overlay.png',
-            icon_size = 32,
-
-            max_health = 1,
-            order = 'z[resource-monitor]',
-
-            collision_mask = { layers = { resource = true } },
-            collision_box = { { -0.35, -0.35 }, { 0.35, 0.35 } },
-
-            selection_box = { { -0.5, -0.5 }, { 0.5, 0.5 } },
-            inventory_size = 1,
-            picture =
-            {
-                filename = '__YARM__/graphics/rm_Overlay.png',
-                priority = 'extra-high',
-                width = 32,
-                height = 32,
-                shift = { 0.0, 0.0 }
-            }
-        },
-
         {
             type = 'font',
             name = 'yarm-gui-font',
diff --git a/resmon.lua b/resmon.lua
index 1c30dbe..9a5771d 100644
--- a/resmon.lua
+++ b/resmon.lua
@@ -422,12 +422,14 @@ function resmon.put_marker_at(surface, pos, player_data)
         return
     end
 
-    local overlay = surface.create_entity { name = "rm_overlay",
-        force = game.forces.neutral,
-        position = pos }
-    overlay.minable = false
-    overlay.destructible = false
-    overlay.operable = false
+    local overlay = rendering.draw_rectangle {
+        left_top = { math.floor(pos.x), math.floor(pos.y) },
+        right_bottom = { math.floor(pos.x+1), math.floor(pos.y+1) },
+        filled = true,
+        color = { 0, 0, 0.5, 0.4 },
+        surface = surface,
+        draw_on_ground = true,
+    }
     table.insert(player_data.overlays, overlay)
 end