--- a/Samples/Simple/include/SSAO.h	2020-04-26 13:54:31.321908377 +0200
+++ b/Samples/Simple/include/SSAO.h	2020-04-26 13:54:47.497909935 +0200
@@ -65,7 +65,7 @@
     SSAOGBufferSchemeHandler()
     {
         mGBufRefMat = Ogre::MaterialManager::getSingleton().getByName("SSAO/GBuffer");
-        RTShader::ShaderGenerator::getSingleton().validateMaterial("GBuffer", "SSAO/GBuffer");
+        RTShader::ShaderGenerator::getSingleton().validateMaterial("GBuffer", "SSAO/GBuffer", "OgreAutodetect");
         mGBufRefMat->load();
     }