diff --git a/source/core/input/input.cpp b/source/core/input/input.cpp
index f7d2d95..a668690 100644
--- a/source/core/input/input.cpp
+++ b/source/core/input/input.cpp
@@ -40,6 +40,7 @@ Input::Input(std::string game_controller_db_path)
         {Action::TOGGLE_FULLSCREEN, KeyState{.scancode = SDL_SCANCODE_F3}},
         {Action::TOGGLE_VSYNC, KeyState{.scancode = SDL_SCANCODE_F4}},
         {Action::TOGGLE_ANTIALIAS, KeyState{.scancode = SDL_SCANCODE_F5}},
+        {Action::TOGGLE_POSTFX, KeyState{.scancode = SDL_SCANCODE_F6}},
         {Action::EXIT, KeyState{.scancode = SDL_SCANCODE_ESCAPE}}};
 
     initSDLGamePad();  // Inicializa el subsistema SDL_INIT_GAMEPAD
diff --git a/source/core/input/input_types.hpp b/source/core/input/input_types.hpp
index a32f6d1..40a7997 100644
--- a/source/core/input/input_types.hpp
+++ b/source/core/input/input_types.hpp
@@ -22,6 +22,7 @@ enum class InputAction : std::uint8_t {  // Acciones de entrada posibles en el j
     TOGGLE_FULLSCREEN,  // F3
     TOGGLE_VSYNC,       // F4
     TOGGLE_ANTIALIAS,   // F5
+    TOGGLE_POSTFX,      // F6
     EXIT,               // ESC
 
     // Input obligatorio
diff --git a/source/core/rendering/gpu/gpu_frame_renderer.cpp b/source/core/rendering/gpu/gpu_frame_renderer.cpp
index ff23e3e..21b99aa 100644
--- a/source/core/rendering/gpu/gpu_frame_renderer.cpp
+++ b/source/core/rendering/gpu/gpu_frame_renderer.cpp
@@ -425,10 +425,10 @@ namespace Rendering::GPU {
             render_pass_ = nullptr;
         }
 
-        // Si el bloom està desactivat, fem clear a negre sobre bloom_b perquè
-        // el composite el samplegi com a "sense bloom" sense haver de tenir un
-        // path alternatiu al shader.
-        const bool BLOOM_ON = postfx_params_.bloom_enabled;
+        // Si el bloom està desactivat (per config o per l'interruptor mestre
+        // F6), fem clear a negre sobre bloom_b perquè el composite el samplegi
+        // com a "sense bloom" sense haver de tenir un path alternatiu al shader.
+        const bool BLOOM_ON = postfx_enabled_ && postfx_params_.bloom_enabled;
         const float TEXEL_X = 1.0F / render_w_;
         const float TEXEL_Y = 1.0F / render_h_;
         const float SIGMA = postfx_params_.bloom_sigma_px;
@@ -561,18 +561,20 @@ namespace Rendering::GPU {
         // Uniforms del postpro. Si una sección está desactivada, anulamos sus
         // contribuciones (intensidad / amplitud / max=min) en lugar de tener
         // un branch en el shader.
-        const float BLOOM_INTENSITY = postfx_params_.bloom_enabled
-            ? postfx_params_.bloom_intensity
-            : 0.0F;
-        const float FLICKER_AMPLITUDE = postfx_params_.flicker_enabled
-            ? postfx_params_.flicker_amplitude
-            : 0.0F;
-        const float BG_MIN_R = postfx_params_.background_enabled ? postfx_params_.background_min_r : 0.0F;
-        const float BG_MIN_G = postfx_params_.background_enabled ? postfx_params_.background_min_g : 0.0F;
-        const float BG_MIN_B = postfx_params_.background_enabled ? postfx_params_.background_min_b : 0.0F;
-        const float BG_MAX_R = postfx_params_.background_enabled ? postfx_params_.background_max_r : 0.0F;
-        const float BG_MAX_G = postfx_params_.background_enabled ? postfx_params_.background_max_g : 0.0F;
-        const float BG_MAX_B = postfx_params_.background_enabled ? postfx_params_.background_max_b : 0.0F;
+        // L'interruptor mestre (postfx_enabled_) gateja totes les seccions: si
+        // està OFF (F6), tot queda anul·lat i el composite és passthrough de
+        // l'escena offscreen.
+        const bool BLOOM_ON = postfx_enabled_ && postfx_params_.bloom_enabled;
+        const bool FLICKER_ON = postfx_enabled_ && postfx_params_.flicker_enabled;
+        const bool BG_ON = postfx_enabled_ && postfx_params_.background_enabled;
+        const float BLOOM_INTENSITY = BLOOM_ON ? postfx_params_.bloom_intensity : 0.0F;
+        const float FLICKER_AMPLITUDE = FLICKER_ON ? postfx_params_.flicker_amplitude : 0.0F;
+        const float BG_MIN_R = BG_ON ? postfx_params_.background_min_r : 0.0F;
+        const float BG_MIN_G = BG_ON ? postfx_params_.background_min_g : 0.0F;
+        const float BG_MIN_B = BG_ON ? postfx_params_.background_min_b : 0.0F;
+        const float BG_MAX_R = BG_ON ? postfx_params_.background_max_r : 0.0F;
+        const float BG_MAX_G = BG_ON ? postfx_params_.background_max_g : 0.0F;
+        const float BG_MAX_B = BG_ON ? postfx_params_.background_max_b : 0.0F;
 
         // Tiempo en segundos desde el inicio de SDL (wall-clock real, robusto a FPS variables).
         const float TIME_SECONDS = static_cast<float>(SDL_GetTicks()) / 1000.0F;
diff --git a/source/core/rendering/gpu/gpu_frame_renderer.hpp b/source/core/rendering/gpu/gpu_frame_renderer.hpp
index 3910091..d3809ab 100644
--- a/source/core/rendering/gpu/gpu_frame_renderer.hpp
+++ b/source/core/rendering/gpu/gpu_frame_renderer.hpp
@@ -118,6 +118,12 @@ namespace Rendering::GPU {
         void setPostFx(const PostFxParams& params) { postfx_params_ = params; }
         [[nodiscard]] auto postfx() const -> const PostFxParams& { return postfx_params_; }
 
+        // Interruptor mestre del postpro (F6). Quan està OFF, ni bloom ni
+        // flicker ni background pulse afecten el frame — l'escena offscreen
+        // surt tal com s'ha renderitzat (passthrough). Útil per A/B testing.
+        void setPostFxEnabled(bool enabled) { postfx_enabled_ = enabled; }
+        [[nodiscard]] auto isPostFxEnabled() const -> bool { return postfx_enabled_; }
+
         // Acceso a internals.
         [[nodiscard]] auto device() -> GpuDevice& { return device_; }
         [[nodiscard]] auto isInsideFrame() const -> bool { return cmd_buffer_ != nullptr; }
@@ -173,6 +179,10 @@ namespace Rendering::GPU {
         // Estat de l'antialias geomètric a les línies (toggle F5).
         bool antialias_enabled_{true};
 
+        // Interruptor mestre del postpro (toggle F6). Quan és false, bloom +
+        // flicker + background pulse queden anul·lats (passthrough de l'escena).
+        bool postfx_enabled_{true};
+
         // Helpers internos.
         [[nodiscard]] auto createOffscreen() -> bool;
         void destroyOffscreen();
diff --git a/source/core/rendering/sdl_manager.cpp b/source/core/rendering/sdl_manager.cpp
index a672812..a42e896 100644
--- a/source/core/rendering/sdl_manager.cpp
+++ b/source/core/rendering/sdl_manager.cpp
@@ -377,3 +377,13 @@ void SDLManager::toggleAntialias() {
         notifier->notifyInfo(cfg_->rendering.antialias != 0 ? "AA ACTIU" : "AA INACTIU");
     }
 }
+
+void SDLManager::togglePostFx() {
+    const bool NEW_STATE = !gpu_renderer_.isPostFxEnabled();
+    gpu_renderer_.setPostFxEnabled(NEW_STATE);
+    // No persistim: el toggle és per A/B testing visual, l'estat per defecte
+    // del joc continua sent "postfx ON" segons defaults/YAML.
+    if (auto* notifier = System::Notifier::get(); notifier != nullptr) {
+        notifier->notifyInfo(NEW_STATE ? "POSTPROCESSAT ACTIU" : "POSTPROCESSAT INACTIU");
+    }
+}
diff --git a/source/core/rendering/sdl_manager.hpp b/source/core/rendering/sdl_manager.hpp
index ca71bee..ec1ee35 100644
--- a/source/core/rendering/sdl_manager.hpp
+++ b/source/core/rendering/sdl_manager.hpp
@@ -35,6 +35,7 @@ class SDLManager {
     void toggleFullscreen();                                 // F3
     void toggleVSync();                                      // F4
     void toggleAntialias();                                  // F5
+    void togglePostFx();                                     // F6
     auto handleWindowEvent(const SDL_Event& event) -> bool;  // Per a SDL_EVENT_WINDOW_RESIZED
 
     // Funciones principals (renderizado).
diff --git a/source/core/system/global_events.cpp b/source/core/system/global_events.cpp
index afd1e3b..7322a8d 100644
--- a/source/core/system/global_events.cpp
+++ b/source/core/system/global_events.cpp
@@ -58,6 +58,10 @@ namespace GlobalEvents {
                     sdl.toggleAntialias();
                     return true;
 
+                case SDL_SCANCODE_F6:
+                    sdl.togglePostFx();
+                    return true;
+
                 case SDL_SCANCODE_ESCAPE: {
                     // Doble pulsació per confirmar sortida: la primera ESC
                     // dispara un toast d'avís; només si aquest toast concret