diff --git a/source/core/graphics/playfield.cpp b/source/core/graphics/playfield.cpp
index 8d74d42..f382a4e 100644
--- a/source/core/graphics/playfield.cpp
+++ b/source/core/graphics/playfield.cpp
@@ -196,13 +196,39 @@ namespace Graphics {
         lines_.clear();
         lines_.reserve(verticals.size() + horizontals.size());
 
+        // El spawn_time_s s'assigna per índex espacial perquè la diagonal de
+        // l'ona de creixement avanci uniformement. L'ordre dins lines_, en
+        // canvi, ha de garantir que el grid principal (més brillant) es
+        // dibuixi DESPRÉS del subgrid: així a les interseccions guanya el
+        // principal i no queden tallades pel subgrid.
         for (int i = 0; i < NUM_V; i++) {
             verticals[i].spawn_time_s = static_cast<float>(i) * INTERVAL_V;
-            lines_.push_back(verticals[i]);
         }
         for (int i = 0; i < NUM_H; i++) {
             horizontals[i].spawn_time_s = static_cast<float>(i) * INTERVAL_H;
-            lines_.push_back(horizontals[i]);
+        }
+
+        // Passada 1: subgrid (verticals + horitzontals).
+        for (const auto& v : verticals) {
+            if (v.brightness < Defaults::Playfield::GRID_BRIGHTNESS) {
+                lines_.push_back(v);
+            }
+        }
+        for (const auto& h : horizontals) {
+            if (h.brightness < Defaults::Playfield::GRID_BRIGHTNESS) {
+                lines_.push_back(h);
+            }
+        }
+        // Passada 2: grid principal (verticals + horitzontals).
+        for (const auto& v : verticals) {
+            if (v.brightness >= Defaults::Playfield::GRID_BRIGHTNESS) {
+                lines_.push_back(v);
+            }
+        }
+        for (const auto& h : horizontals) {
+            if (h.brightness >= Defaults::Playfield::GRID_BRIGHTNESS) {
+                lines_.push_back(h);
+            }
         }
     }