Re: Venturi3d example
with all indicators in our code you are able to define boolean arithmeitc, which means that you can combine indicators (+) or intersect them (-). I think your idea is to intersect the cylinder by a cuboid.
The offset means that you deal by the renaming process with a certain offset in an cartesian coordinate. if you just use rename 2,1 all your cells with 2 will disappear. The offset gives you the possibility to create a layer in the directions that you want.