After some test, a new iteration parameter has been added in order to apply repetitive smoothing to the stroke. By default 1 iteration is applied, but can used any number between 1 and 3. The repetition uses different levels of intensity from 100% of the defined smooth factor for the first loop, 50% for the second and 25% for the third. We use in each loop a smaller value in order to avoid deform too much the stroke.