Reply To: [ENDED] BC1-1808 – August 2018 Class Homepage – Getting Started with 3D Modeling & Blender 2.8
@yukinoh1989 Just to confirm what the Boolean modifier does is essentially allow you to add or subtract geometry from one shape using another. Okay, lets assume you want to cut a hole into a cube, for this you’d probably use a cylinder (though you may want to use a sphere depending on the kind:
You’ll then want to go to the modifiers tab on the object you wish to alter (in this case the cube) which you see on the right, then click on the drop-down and select Boolean. Then move the object doing the altering (the cylinder) to where you want to make the edit.
Now to make it so the Boolean actually *does* something, you must select an “object”. This determines what will be doing the editing. Seeing as we want the cylinder to do the cutting, you can either select the little eyedropper tool in the object drop-down and click on the cylinder or select it from the drop-down. Now there are three types of “Operations”, which determines what the Boolean actually does. The default and in my opinion the least used is Intersect. This means every part of the receiving mesh interacting with the altering mesh will be preserved whilst any parts not touching the altering mesh will disappear, like so:
The next Operation is Union, which will essentially fuse the two meshes together in a way that makes sense. Do note this is usually a way to get bad topology (using Boolean in general is really) but at this stage that’s not a concern.
Finally, and what I consider the most useful, is Difference. This basically cuts into the receiving mesh with what parts of the altering mesh are interacting with it, like so:
Hope this manages to clear things up, and feel free to ask me to go in depth on anything and I’ll certainly try my best!