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Boolean not working properly with lines aligned.
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System Information
Operating system: Windows 10 Pro
Graphics card: Nvidia GTX 1070

Blender Version
Broken: v2.80.59, April 26, 2019
Worked: (optional)

Short description of error
I was working on a complex shape and I create a simple shape where every line in the simple shape is matched up with the complex shape. I also used the Boolean with “difference”. Something was wrong, so I ended up investigating and found out the cause.

Here are the explanation and picture below:

The “A” has 2 cubes where these lines are not aligned with the other cube’s lines. You can see that it have loop cuts (this is a very similar case where my complex shape has). You can look at two pictures on the left and right. You’ll see that the right picture show that “A” where boolean is working properly.

The “B” has the opposite idea to what “A” is where two cubes marked "B" have their lines just perfectly aligned. On the right picture is showing that the boolean is not working properly due to these lines being aligned…