diff --git a/effects/blur/blurshader.cpp b/effects/blur/blurshader.cpp
index 1542578e15..5e0da02e19 100644
--- a/effects/blur/blurshader.cpp
+++ b/effects/blur/blurshader.cpp
@@ -229,7 +229,7 @@ void GLSLBlurShader::init()
     stream << "\n";
     stream << "void main(void)\n";
     stream << "{\n";
-    stream << "    vec2 center = vec4(texCoord * u_textureMatrix).st;\n\n";
+    stream << "    vec2 center = vec4(u_textureMatrix*texCoord).st;\n\n";
 
     for (int i = 0; i < center; i++)
         stream << "    samplePos" << i << " = center + pixelSize * vec2("
@@ -239,7 +239,7 @@ void GLSLBlurShader::init()
         stream << "    samplePos" << i << " = center + pixelSize * vec2("
                << 1.5 + (i - center - 1) * 2.0 << ");\n";
     stream << "\n";
-    stream << "    gl_Position = vertex * u_modelViewProjectionMatrix;\n";
+    stream << "    gl_Position = u_modelViewProjectionMatrix*vertex;\n";
     stream << "}\n";
     stream.flush();
 
diff --git a/effects/cube/cube.cpp b/effects/cube/cube.cpp
index 89edf32b41..8710d16e92 100644
--- a/effects/cube/cube.cpp
+++ b/effects/cube/cube.cpp
@@ -1438,7 +1438,7 @@ void CubeEffect::paintWindow(EffectWindow* w, int mask, QRegion region, WindowPa
             if (reflectionPainting) {
                 shader->setUniform("screenTransformation", m_reflectionMatrix * m_rotationMatrix * origMatrix);
             } else {
-                shader->setUniform("screenTransformation", m_rotationMatrix * origMatrix);
+                shader->setUniform("screenTransformation", origMatrix*m_rotationMatrix);
             }
         }
     }
diff --git a/effects/cube/data/cylinder.vert b/effects/cube/data/cylinder.vert
index 5d685d368a..9a520bb2b0 100644
--- a/effects/cube/data/cylinder.vert
+++ b/effects/cube/data/cylinder.vert
@@ -47,5 +47,5 @@ void main()
     vec3 diff = (vertex.xyz - transformedVertex.xyz)*timeLine;
     transformedVertex.xyz += diff;
 
-    gl_Position = transformedVertex*(windowTransformation*screenTransformation*modelview)*projection;
+    gl_Position = projection*(modelview*screenTransformation*windowTransformation)*transformedVertex;
 }
diff --git a/effects/cube/data/sphere.vert b/effects/cube/data/sphere.vert
index d634d25bcc..8cf3a07b03 100644
--- a/effects/cube/data/sphere.vert
+++ b/effects/cube/data/sphere.vert
@@ -51,5 +51,5 @@ void main()
     vec3 diff = (vertex.xyz - transformedVertex.xyz)*timeLine;
     transformedVertex.xyz += diff;
 
-    gl_Position = transformedVertex*(windowTransformation*screenTransformation*modelview)*projection;
+    gl_Position = projection*(modelview*screenTransformation*windowTransformation)*transformedVertex;
 }
diff --git a/libkwineffects/kwinglutils.cpp b/libkwineffects/kwinglutils.cpp
index f8ddb693ff..bcf1713d63 100644
--- a/libkwineffects/kwinglutils.cpp
+++ b/libkwineffects/kwinglutils.cpp
@@ -989,10 +989,8 @@ bool GLShader::setUniform(int location, const QMatrix4x4 &value)
         GLfloat m[16];
         const qreal *data = value.constData();
         // i is column, j is row for m
-        for (int i = 0; i < 4; ++i) {
-            for (int j = 0; j < 4; ++j) {
-                m[i*4+j] = data[j*4+i];
-            }
+        for (int i = 0; i < 16; ++i) {
+            m[i] = data[i];
         }
         glUniformMatrix4fv(location, 1, GL_FALSE, m);
     }
@@ -1048,10 +1046,10 @@ QMatrix4x4 GLShader::getUniformMatrix4x4(const char* name)
     if (location >= 0) {
         GLfloat m[16];
         glGetUniformfv(mProgram, location, m);
-        QMatrix4x4 matrix(m[0], m[1],  m[2], m[3],
-                          m[4], m[5],  m[6], m[7],
-                          m[8], m[9], m[10], m[11],
-                          m[12], m[13], m[14], m[15]);
+        QMatrix4x4 matrix(m[0], m[4], m[8],  m[12],
+                          m[1], m[5], m[9],  m[13],
+                          m[2], m[6], m[10], m[14],
+                          m[3], m[7], m[11], m[15]);
         matrix.optimize();
         return matrix;
     } else {
diff --git a/scene-color-vertex.glsl b/scene-color-vertex.glsl
index 651e22ab3a..d06dff09ff 100644
--- a/scene-color-vertex.glsl
+++ b/scene-color-vertex.glsl
@@ -6,5 +6,5 @@ uniform vec2 offset;
 attribute vec4 vertex;
 
 void main() {
-    gl_Position = vec4(vertex.xy + offset, vertex.zw) * projection;
+    gl_Position = projection*vec4(vertex.xy + offset, vertex.zw);
 }
diff --git a/scene-generic-vertex.glsl b/scene-generic-vertex.glsl
index 6672dec5a6..1d93b76fb9 100644
--- a/scene-generic-vertex.glsl
+++ b/scene-generic-vertex.glsl
@@ -16,5 +16,5 @@ varying vec2 varyingTexCoords;
 
 void main() {
     varyingTexCoords = texCoord / vec2(textureWidth, textureHeight);
-    gl_Position = vertex*(windowTransformation*screenTransformation*modelview)*projection;
+    gl_Position = projection*(modelview*screenTransformation*windowTransformation)*vertex;
 }
diff --git a/scene-vertex.glsl b/scene-vertex.glsl
index 5869dcdac6..43bf297adc 100644
--- a/scene-vertex.glsl
+++ b/scene-vertex.glsl
@@ -15,5 +15,5 @@ varying vec2 varyingTexCoords;
 
 void main() {
     varyingTexCoords = texCoord / vec2(textureWidth, textureHeight);
-    gl_Position = vec4(vertex.xy + offset, vertex.zw) * projection;
+    gl_Position = projection*vec4(vertex.xy + offset, vertex.zw);
 }