Yes, Thank you. I've examined my original scan 600 dpi, but pencil marks for some reason don't close fully some letters (to make MS Paint fill bucket work for example). The smoothing parameter, I have yet to test, I always kept that the same value when tweking others, but I suspect it could be related to the whisps. I also thought Bitmap tracer could fix it, or didn't know the scan had so many gaps, and then xfer to MS Paint for fill bucket. So, I'll look at the scanning settings. Thank you.