here is the link, the rest is in there.
http://fenneclabs.net/index.php/2018/12/09/3d-printing-transparent-parts-using-fdm-fff-printer/
We have several transparent parts that we have printed on our J750 here in the office. The coolest one I think is the tail light for an Audi I've included a picture of it with the light shining through and a link to the article here!

that is translucent, transparent is the glass of a window that you look out in the street and can see all details through. But you can make it transparent too, if you do it right.