Is your line art shaky, wobbly, sloppy, fat, uneven or pixelated? The subject of clean line art comes up a lot so I've gathered together a number of tips from various DA members that may help you improve your line art. Some of the techniques described below may contradict other techniques described below so you may want to experiment and decide what works best for you. Most of these assume that you have a digital tablet. (Make sure your tablet drivers have been installed correctly. If your cursor is behaving erratically it may indicate a problem with your tablet or drivers.) Some posts have been edited for brevity or spelling:
"I developed my own technique. And it works quite well for me. It raised my Lineart cleanliness from 24% to 98%, yeah, really. Here is how I do it digitally when I'm not using a traditional sketch:
First a rough sketch, and I isolate it in its own layer then set its opacity to 50 or something near that value.
Then on the second layer