I cant seem to Cut a hole in Any objects with the Difference operation while using the Boolean Modifier, All it does make Objects Disappear or Instead give me an Error(Unable to perform Boolean Operation)
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May you please upload a .blend file? the only time I had this problem was when I selected an object with no mash overlapping but I can't tell that from you screenshot. Thank you! – ruckus Mar 07 '15 at 02:37
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Possible related issue with this question: Why doesn't the boolean modifier work for me? – Leon Cheung Mar 07 '15 at 02:51
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1It could be that you are trying to affect a mesh that is *non-manifold* read:http://blender.stackexchange.com/questions/7910/what-is-non-manifold-geometry – Mar 07 '15 at 02:53
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My build of Blender 2.73 performs the Boolean operations flawlessly, either it is a bug or you are trying to perform the operation on a non-,manifold mesh as Cegaton mentioned. We need your .blend file to be sure. One thing you can try is adding a new cube scaled by 2, and adding a new cylinder and scaling on the z axis by 3, and performing the operation with them. – J Sargent Mar 07 '15 at 12:32
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It appears that your mesh with the Boolean modifier is a 2-dimensional plane, this will cause some issues with your Boolean operations. I noticed some very unusual behavior when trying to perform a Boolean operation on a 2-dimensional mesh (final result, difference mesh has been deleted):
However if I extruded the plane a small amount, the result was completely normal:
I think you will have to add some thickness to your mesh before using the Boolean modifier if you want to achieve expected results.
Also see this answer to a very similar question.
