diff --git a/modules/client/client.lua b/modules/client/client.lua
index acf2800d..cf9aae22 100644
--- a/modules/client/client.lua
+++ b/modules/client/client.lua
@@ -40,10 +40,10 @@ function Client.init()
     scheduleEvent(function()
         g_window.show()
 
-        -- play startup music
-        --g_sounds.playMusic("startup.ogg", 3)
-        --connect(g_game, { onGameStart = function() g_sounds.stopMusic(3) end })
-        --connect(g_game, { onGameEnd= function() g_sounds.playMusic("startup.ogg", 3) end })
+        -- Play startup music (The Silver Tree, by Mattias Westlund)
+        g_sounds.playMusic("startup.ogg", 3)
+        connect(g_game, { onGameStart = function() g_sounds.stopMusic(3) end })
+        connect(g_game, { onGameEnd= function() g_sounds.playMusic("startup.ogg", 3) end })
     end, 0)
   end, 0)
 end
diff --git a/modules/client_skins/skins/example.lua b/modules/client_skins/skins/example.lua
index 3f8fd1b2..3f43ecea 100644
--- a/modules/client_skins/skins/example.lua
+++ b/modules/client_skins/skins/example.lua
@@ -1,6 +1,6 @@
 local skin = {
 	name = 'Example',
-	
+
 	styles = {
 		'topmenu.otui'
 	}
diff --git a/modules/game_shaders/shaders.lua b/modules/game_shaders/shaders.lua
index b88a740c..124bb589 100644
--- a/modules/game_shaders/shaders.lua
+++ b/modules/game_shaders/shaders.lua
@@ -25,7 +25,6 @@ local shadersPanel
 function Shaders.init()
   importStyle 'shaders.otui'
 
-
   Keyboard.bindKeyDown(HOTKEY, Shaders.toggle)
 
   shadersPanel = createWidget('ShadersPanel', GameInterface.getMapPanel())
@@ -37,6 +36,8 @@ function Shaders.init()
     map:setMapShader(g_shaders.getShader(option))
   end
 
+  if not g_graphics.canUseShaders() then return end
+
   for _i,opts in pairs(MAP_SHADERS) do
     local shader = g_shaders.createFragmentShader(opts.name, opts.frag)
 
diff --git a/modules/game_shaders/shaders/radialblur.frag b/modules/game_shaders/shaders/radialblur.frag
index c3b3e8c9..fe359aeb 100644
--- a/modules/game_shaders/shaders/radialblur.frag
+++ b/modules/game_shaders/shaders/radialblur.frag
@@ -7,9 +7,6 @@ const float sampleStrength = 2.2;
 
 void main(void)
 {
-    // some sample positions
-    float samples[] = { -0.08,-0.05,-0.03,-0.02,-0.01,0.01,0.02,0.03,0.05,0.08 };
-
     // 0.5,0.5 is the center of the screen
     // so substracting v_TexCoord from it will result in
     // a vector pointing to the middle of the screen
@@ -29,8 +26,16 @@ void main(void)
 
     // take 10 additional blur samples in the direction towards
     // the center of the screen
-    for(int i = 0; i < 10; i++)
-        sum += texture2D(u_Tex0, v_TexCoord + dir * samples[i] * sampleDist);
+    sum += texture2D(u_Tex0, v_TexCoord - 0.08 * dir * sampleDist);
+    sum += texture2D(u_Tex0, v_TexCoord - 0.05 * dir * sampleDist);
+    sum += texture2D(u_Tex0, v_TexCoord - 0.03 * dir * sampleDist);
+    sum += texture2D(u_Tex0, v_TexCoord - 0.02 * dir * sampleDist);
+    sum += texture2D(u_Tex0, v_TexCoord - 0.01 * dir * sampleDist);
+    sum += texture2D(u_Tex0, v_TexCoord + 0.01 * dir * sampleDist);
+    sum += texture2D(u_Tex0, v_TexCoord + 0.02 * dir * sampleDist);
+    sum += texture2D(u_Tex0, v_TexCoord + 0.03 * dir * sampleDist);
+    sum += texture2D(u_Tex0, v_TexCoord + 0.05 * dir * sampleDist);
+    sum += texture2D(u_Tex0, v_TexCoord + 0.08 * dir * sampleDist);
 
     // we have taken eleven samples
     sum *= 1.0/11.0;
@@ -42,4 +47,4 @@ void main(void)
 
     //Blend the original color with the averaged pixels
     gl_FragColor = mix(color, sum, t);
-} 
\ No newline at end of file
+}
\ No newline at end of file
diff --git a/src/framework/graphics/painter.cpp b/src/framework/graphics/painter.cpp
index 9b9bd449..4d4f2139 100644
--- a/src/framework/graphics/painter.cpp
+++ b/src/framework/graphics/painter.cpp
@@ -23,6 +23,8 @@
 #include "painter.h"
 #include "graphics.h"
 
+#include <framework/platform/platformwindow.h>
+
 Painter *g_painter = nullptr;
 
 Painter::Painter()
@@ -35,6 +37,7 @@ Painter::Painter()
     m_shaderProgram = nullptr;
     m_texture = nullptr;
     m_alphaWriting = false;
+    setResolution(g_window.getSize());
 }
 
 void Painter::resetState()
@@ -50,11 +53,11 @@ void Painter::resetState()
 
 void Painter::refreshState()
 {
+    updateGlViewport();
     updateGlCompositionMode();
     updateGlClipRect();
     updateGlTexture();
     updateGlAlphaWriting();
-    updateGlViewport();
 }
 
 void Painter::saveState()
diff --git a/src/framework/graphics/painterogl1.cpp b/src/framework/graphics/painterogl1.cpp
index 573319eb..f05acee0 100644
--- a/src/framework/graphics/painterogl1.cpp
+++ b/src/framework/graphics/painterogl1.cpp
@@ -20,7 +20,7 @@
  * THE SOFTWARE.
  */
 
-#ifndef OPENGL_ES
+#if !defined(OPENGL_ES) || OPENGL_ES==1
 
 #include "painterogl1.h"
 #include "graphics.h"
diff --git a/src/framework/luafunctions.cpp b/src/framework/luafunctions.cpp
index de1874b1..8228c62e 100644
--- a/src/framework/luafunctions.cpp
+++ b/src/framework/luafunctions.cpp
@@ -562,6 +562,7 @@ void Application::registerLuaFunctions()
     g_lua.bindSingletonFunction("g_graphics", "isPainterEngineAvailable", &Graphics::isPainterEngineAvailable, &g_graphics);
     g_lua.bindSingletonFunction("g_graphics", "selectPainterEngine", &Graphics::selectPainterEngine, &g_graphics);
     g_lua.bindSingletonFunction("g_graphics", "canCacheBackbuffer", &Graphics::canCacheBackbuffer, &g_graphics);
+    g_lua.bindSingletonFunction("g_graphics", "canUseShaders", &Graphics::canUseShaders, &g_graphics);
     g_lua.bindSingletonFunction("g_graphics", "getPainterEngine", &Graphics::getPainterEngine, &g_graphics);
     g_lua.bindSingletonFunction("g_graphics", "getViewportSize", &Graphics::getViewportSize, &g_graphics);
     g_lua.bindSingletonFunction("g_graphics", "getVendor", &Graphics::getVendor, &g_graphics);