Thanks @scottunreal for the answer and for the video example! Really helpful.
yes volumetric capture is what I am looking for ! I already do the “normal” way with the green screen as you mention, I am looking to take this one step further now 
Do you have any information you can send me regarding volumetric capture, how it works, how to set this up, what gears to be used … ?
Thanks a lot again,
Martin