Unfortunately I am in rush. I am currently working on an other way to illuminate my cyclorama:
I use the existing LED fixture with a mega beam spreading. In addition I color the white cyclorama by the mean of material section. The cyclorama will be uniform so it should not be a problem to do like that. By this way it should like I want and the fixtures placement is correct.
I just received an e-mail from Leader Light. I explained me that they are waiting on data from a partner company... In addition Leader Light will come to PLASA so it will shift their answer of one week.

_________________Nathanaël Sunier
Lighting Designer / grandMA3-2-1 Programmer
https://nathanael.sunier.net