Also consider OpenSCAD: https://files.openscad.org/examples/Basics/union.html https://files.openscad.org/examples/Basics/union.html difference(); union(); def

Also consider OpenSCAD: https://files.openscad.org/examples/Basics/union.html https://files.openscad.org/examples/Basics/union.html difference(); union(); def my_obj(p1, p2, p3) { for(...p1...) { sphere(p2); cube(p3); } }; ...etc...