I installed both Unity Tweak Tool and Compiz Config Settings Manager to try and make my launcher transparent in Ubuntu 16.04. Adjusting the launcher transparency in both of these programs had no change on the launcher's opacity/transparency. In Compiz I changed the 'maximised window' opacity to 0 and it immediately became clear so I am not sure why the launcher is not changing in opacity. I have also tried using the following get command to check the transparency and set command to set the transparency. The get command returns whatever I value I use the set command to set which makes sense but again the transparency is not visibly changing. Is a transparent launcher not possible in 16?