Hi,
thank you for your answers,
I'm not sure I understood the PSD file... and yeah i tought about the geometry tab but the problem is that if I map the projector it will affect everything I shoot with the FOH projector, even the image on the screen without windows.
I found a method with virtual displays...
I made one virtual display for each of the 18 windows.
These 18 virtual displays "grab" each part of the image corresponding to their window. And I place them in ANOTHER virtual display where I apply a tween corner on each individually. Then I lock these layers.
Each time I have my window wall, I place my media behind the 18 virtual displays, and then use my ALL windows virtual display in my FOH projector.
That seems to be working for now...
That's the best way I found to keep control on my mapping and have it affect all my cues without copy and paste corners tween each time.