Joining instead of Cutting with BoolTool Ctrl Shift - Shortcut I have been using Blender to edit STL files for resin 3d Printing.
I have an object that I want to cut and I create the shape I want to cut out of it, but when I give the ⎈ Ctrl+⇧ Shift+ - command, the two objects are joined.
I select the cutting shape, hold ⇧ Shift and select the part to be cut, then give the ⎈ Ctrl+⇧ Shift+- command, and about 50% of the time it will join the items. The other 50% it will cut the way I want it to.
Why?
Use the Boolean modifier in Properties &gt; Modifier Properties &gt; Add Modifier &gt; Boolean, and choose the object you want to cut with, in the menu for Object. I'm not sure what Ctrl Shift - shortcut does.