I’m having issues with getting boolean difference to work. I am building a treasure chest for 3D printing and I wanted to hollow out the inside (so I could print some plug-in pieces that looked like gold or something).
I build the outside of the mesh just fine but now I am just trying to subtract some volume inside it. I made a smaller profile that I want to subtract to give the inside of the top of my treasure chest some contour.
However, when I use boolean->difference it is working like a union function instead. I even converted all my n-gons to tris thinking that would help. But it didn’t.
I also had issues splitting the treasure chest into two (lid and base) just using a simple plane to cut it in two.
I put a copy of the .blend up on my Google Drive here. I am using Blender 2.8 as released on 3/8/19.