That’s my first post, I’m afraid the topic is already solved but I was unable to find it.
I suppose that’s because I don’t have the right vocabulary using Blender.
My issue is about digging holes…to do so I use extrusion because I have been told that using boolean is not always a good idea.
The fact is when two extrusions intersect I have faces that I don’t want.
The problem you have here is that an extrusion aswell as bridging are operations with a limited scope. Its not meant to interact with and process the whole mesh, its just processing the faces its triggered on. There is a little exception to this and this is the extrude manifold operator, but to make a long story short, no that one is not gonna help you in this case.
What you look for is indeed a boolean operation or classical csg modeling.
So yes, even if there are cases where the boolean modifier might fail, its the easiest thing how you can tackle this. So use it, the tip you got is simply not good.
For completeness. As always there are dozens of ways how you can model this, but its all rather difficult in comparison.
