Boolean modifier difference between curved objects not working well I tried to make difference between the two concentric cylinders. The boolean operation works well for the straight ones. But after I added the curve modifier to both cylinders, and did the difference again. There were some redundant faces left for the large cylinders.
Why did this happen? Could someone give some hint or advice? Thanks!
My file can be downloaded here:
https://www.dropbox.com/sh/l1vw12idg72vccn/AACewT_XSUhBMdP1CqA8L5zsa?dl=0

enter image description here
select your cylinder.005

go to edit mode

select only the end circle of your cylinder




press CTRL-E -&gt; extrude along normals

make it a bit longer with mouse

same procedure on other side

result: (boolean to exact)