hello, if this has already been posted, I appologize and please delete it. But,I found a way to get more realistic screentones and such in adobe photoshop without the weird halftone filter. Here is a website that has tons of screentones as pattern files you can use! you just use the paint bucket to fill them in on your drawing! also, there are many brushes there to download to make your job easier
3nodding Screentones