# Trying to use Boolean (difference) Modifier on a ring design and its not working correctly?

Okay so I followed this you tube video to make this ring and they way it is done on the video isn't working for me, I am not sure what the problem is. I have tried everything I found on the internet,! advice from author

activating the 3D print tool addon and running the solid to check for problems, which it is saying I have some non manifold edges,! which are there bc those sides do not have faces because I used a mirror modifier on x and y to complete my basic shape, but I don't know how that could be the problem with the boolean because that is how its done on the video and it works?? I have done everything i can think of, even rearranging the modifiers,results from the video I have checked all the normals I'm out of things to try, please help?

• Could you upload your .blend? It's hard to say in this case what the problem is without fiddling with the file..
– gandalf3
Jul 15, 2014 at 19:13
• I would love to, just have no idea where to upload it on this site? Help please?lol Jul 16, 2014 at 2:32
• You can't currently, instead you'll have to use pasteall or something and put the link here.
– gandalf3
Jul 16, 2014 at 2:33
• Okay here it is thank you so much for your help, I learned something new! pasteall.org/blend/30443 Jul 16, 2014 at 17:41

Boolean operations sometimes fail when vertices between the two objects line up exactly.
You can work around this by moving one of the objects a very small amount.

Example .blend

• Thanks a million gandalf3, I finally got it!! Here I thought it was a setting or something...lol Jul 17, 2014 at 14:22

I too am building up a ring and ran into this very problem.

Here are some things to check:

• Check your mesh for doubles
• select all
• (Blender 2.8) Mesh > Clean Up > Merge By Distance
• Check that your meshes are Manifold
• This one has usually been my culprit
• Go to edit mode
• Select none
• Ctrl + Alt + Shift + M
• This will highlight any non-manifold geometry
• you will then need to find a way to fix it (google is your friend)
• in my case, it was being created in previous boolean modifications

Tip: When doing boolean modifiers, I have found that the Carve setting helped create Manifold geometry. This helps if you are doing successive boolean modifications, since I've found that non-manifold geometry behaves poorly with subsequent Boolean Modifiers.

Good luck on your journey, I hope it goes well!