This is the rough of today's strip I sent to Stacy Curtis for inking. I draw the roughs on Canson Marker Layout, a semi-translucent paper, using various sizes of Micron pens. Then I email it to Stacy, who prints it out to his preferred size and slaps it on a lightbox, then inks it on bristol with one of his grungiest, unwashed and most-favorite pens while I take a nap. I did a little photoshop fussing around with the middle panel. It originally had hundreds of tiny zombie toads, and I realized it's an unnecessary cruelty to inflict crowds on my inker, so I simplified it. Some.
And that's how a comic strip collaboration is run these days.