Ogre::MaterialPtr material = Ogre::MaterialManager::getSingletonPtr()->getByName(
        rMaterialName, rGroupName );

    Ogre::Material::TechniqueIterator ti = material->getSupportedTechniqueIterator();
    while( ti.hasMoreElements() )
    {
        Ogre::Technique* technique = ti.getNext();
        Ogre::Technique::PassIterator pi = technique->getPassIterator();
        while( pi.hasMoreElements() )
        {
            Ogre::Pass* pass = pi.getNext();
            Ogre::Pass::ConstTextureUnitStateIterator tui = pass->getTextureUnitStateIterator();
            while( tui.hasMoreElements() )
            {
                Ogre::TextureUnitState* textureUnitState = tui.getNext();
                textureNames.insert( textureUnitState->getName() );
                CLOGI << textureUnitState->getName();
            }
        }
    }