as the road scrolls (moves) from right to left, I'd like to show only the center square of this long road. What I mean really is to show only what's inside this cube (without actually seeing the cube obviously) :
I tried to use the mask modifier but I can't really get to what I want. I was thinking that instead of displaying only what's happening in the cube, it might be easier to mask everything that is inside these ones :
Either way I can't really figure out how to use the mask modifier in that case, to use these cubes as masks without seeing them in the render... I hope I'm clear enough, sorry if it's not. I'd appreciate your help, and wish you a great week-end.