Open cell voronoi model with 10 % porosity

It is. The component “Cull Pattern” before the “Custom Preview”. Right click on it -> bake.

But I would try to learn the basics first, if you don’t even know how to “look” at a finished file someone else did for you. At the latest if your professor (just guessing you’re a student) asks something about the algorythm you will be in trouble.

Good place to start: