It's still working for me, screengrab attached, it shows in viewport and renders as expected - this is C4D R18 on Windows 10. Can you share more details, such as C4D version, OS, scene set up etc? Best of all would be if you could share a scene where you are having problems, you can strip it down to just the essentials if there are models etc you cannot share, or use the private uploader to send it along to us.