I'm very confused about the Boolean difference modifier. I'm modelling a concrete road block for use in a board game. I've created a basic shape and now I want to create grooves in the side by subtracting a wedge using the Boolean modifier. I have uploaded my Blender file to Google Drive:


I've got two copies of my roadblock, named Roadblock 1 and Roadblock 2. The shape I want to subtract is named Wedge. Here's a screenshot (I'm working on one of the copies of the roadblock):

Main Shape

When I select the wedge in the modifier's "Object" field, the roadblock shape disappears completely. I can't put any additional pictures, my reputation isn't high enough. I have tried this with both roadblock objects, and both have the same problem. No matter where I try to subtract the wedge from the object, it disappears entirely. To find out it was the roadblock or the wedge that caused the problem, added a cube and tried subtracting the wedge from the cube, this worked normally. I'm a complete beginner at Blender, and I find this very confusing.

  • $\begingroup$ Some additional information, I have been playing around with it. The problem seems to occur only when the wedge shape intersects with the beveled edge. When I try to subtract in anywhere else it works. $\endgroup$
    – Eyeballs
    Mar 28, 2017 at 10:52
  • $\begingroup$ Common problems when using Boolean - blender.stackexchange.com/questions/34781/… $\endgroup$
    – Mr Zak
    Mar 28, 2017 at 11:56
  • $\begingroup$ I have upgraded to the latest version of Blender, and everything seems to work fine now. Thanks everyone for the help! $\endgroup$
    – Eyeballs
    Mar 30, 2017 at 9:12

1 Answer 1


edit: I spotted you're using 2.69, which is quite old... I'm on 2.78 so it could be a problem with 2.69 perhaps.

I tried your file, and I get this, which is pretty ok, imho, if I got what you exposed in the question:

enter image description here

otherwise maybe you could show what exactly is not working for you?


You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .