How to disable Twig template engine in route?

Question

Twig

The Twig template engine is bolted to the Slim microframework. On some pages of the site you need bare php code without templating crutches. How to disable Twig in a specific route?

$app->get('/post/:id', function($id) use ($app) {
       if ($post = Posts::find($id)) {
      
        $app->render('post.php', array('post' => $post));
    }
    else {
        $app->render('404_post.html');
    }
   
});