It is very tricky since the Billboard orientation is calculated in Aximmetry based on the Camera and the position of the Billboard.
We will check if we can make it more convenient, but for now you can do a trick by moving the scene itself. (and leave the object in place where the billboard stands)

missing transparency on billboard and Luminosity on Adjuster on  Aximmetry De 

How do I get this feature 

Hi Philemon,

In Unreal we have a somewhat smaller degree of freedom to control these things than in our own engine.
Therefore:
- You can only switch if the billboard is lit or not,  you cannot control the level of luminosity.



- You cannot control any transparency mode,  it always act like "Normal".