Reply To: Parallax 1st attempt, fixed scrolling nav not showing up!

[Atelierbram]

Try javascript scroll detection, this example is with jQuery:

$(function() {
 $(window).on("scroll", function() {
   var fromTop = $(window).scrollTop();
   console.log(fromTop);
   $("body").toggleClass("has-scrolled", (fromTop > 1100));
  });
}); 

in CSS something like:

#nav { 
 opacity: 0; 
 transition: opacity 2s;
} 
.has-scrolled #nav { 
 opacity:1; 
 }