It’s working thanks to geometry nodes, there you can take the curve as input and build the boolean cutter from that.
However while it’s not super difficult it’s not straightforward either, best is probably to get comfortable with modeling with geometry nodes first, then see how to solve that problem !
i also tried that method, but the boolean wasnt working. maybe was an issue with the dependecies.
so you extruded the curve and made a boolean and still worked? did you make the boolean inside geo nodes or with the normal boolean modifier?
Everything that is shown in that illustration is part of the sale geo-node modifier :
So yeah it’s using GN bolean which is the same as the regular one, keep in mind that depending on the algorithm it’s sensitive to closed mesh and normal orientation !