title: How to make the NSView transparent, but leave objects belonging to it as they were?
body: <p>In my app I have a NSView that I use as a drawing canvas to draw some primitive shapes like rects and ellipses using NSBezierPath. Right now I need to make my canvas transparent, but I want my shapes that I draw have the same opacity as they had before. I'm curious if it's possible to do it, and if it is, how?!</p>
  
  <p>EDIT:</p>
  
  <p>Sorry for poor previous description! </p>
  
  <p>The ultimate goal for me is to be able to draw normal saturated-color shapes on the transparent canvas. By transparent I mean totally clear if this possible. When I draw shapes my view is redrawing itself all the time, so even under these conditions I want everything to be as described above.</p>
  
  <p>Any kind of help is appreciated! </p>