Hi Clockwork ! thank you for your answer !
I’ve been looking into vertex painting today, i am trying to come out with a plan here:
So i need to have my material with vertex painting, and in a blueprint class actor i need to have a colision box or box trace that send information to the vertex painting mask.
I will need also to get information to tell that the mask is complete so the player can win (but i read that its more something that need C++ ). Do you think it is the right way to think about it ?