diff --git a/data/models/materials.xml b/data/models/materials.xml
index ef23c4c63..980486290 100644
--- a/data/models/materials.xml
+++ b/data/models/materials.xml
@@ -11,6 +11,10 @@
   <material name="stk_mod_nitroBottle.png" />
   <material name="stk_mod_nitroLogo.png" compositing="additive" light="N" disable-z-write="Y" />
 
+  <material name="traffic_light_green.jpg" light="N"/>
+  <material name="traffic_light_yellowjpg" light="N"/>
+  <material name="traffic_light_red.jpg" light="N"/>
+  
   <material name="bubblegum_shield.png" compositing="blend" disable-z-write="Y"/>
   <material name="bubblegum_shield_nolok.png" compositing="blend" disable-z-write="Y"/>
   <material name="parachute.png" backface-culling="n" ignore="Y"/>
diff --git a/src/graphics/material.cpp b/src/graphics/material.cpp
index 626878af3..9ab6ddebe 100644
--- a/src/graphics/material.cpp
+++ b/src/graphics/material.cpp
@@ -645,6 +645,16 @@ void  Material::setMaterialProperties(video::SMaterial *m, scene::IMeshBuffer* m
     }
 
 
+    if (!m_lighting && irr_driver->isGLSL())
+    {
+        // we abuse alpha blender a little here : in the shader-based pipeline,
+        // transparent objects are rendered after lighting has been applied.
+        // Therefore, pretending the object is transparent will have the effect
+        // of making it unaffected by lights
+        m_alpha_blending = true;
+        m_disable_z_write = false;
+    }
+
     int modes = 0;
 
     if (m_alpha_testing)