Cylinder boolean issue

Hey, so I want to bool a cylinder with another one so I can get a hole, but this is the result, I don’t know why it has wrinkles at this part:

Thanks in advance.

It’s because with the operation, you created a bunch of n-gon which the program has a hard time shading as a curved surface.
image

You can work around this by creating a cut close to the hole. Like so:

This restrain the shading calculation to a closer gap to average up to a point where it isn’t visible anymore.

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Thanks! The cut that you mention are those loop cuts or the one highlighted in blue near the hole?

The big horizontal cute, I tried beveling the hole and setting the edges to sharp (that’s the blue). I don’t remember if it helped or not, but you could try that as well.

Cheers!