Then I added a new layer and redrew and colored it:
I decided to do the entire drawing in Adobe Illustrator so I could upload it to the microstock sites I sell art on.
What are microstock sites?
Shutterstock is the best of the best - as far as return on the time invested. I've been on the site for over 2 years now and I've always made more than $100 a month - and most months I don't even upload any new images! You start by uploading 10 images for them to review (they have to be high quality photographs or vector art). Once that's approved you can start uploading any and all images you want to sell!
Dreamstime: This site doesn't sell nearly as many images as Shutterstock, but what it lacks on volume it makes up for in the amount each sale is worth. And they run monthly contests for illustrators and photographers, much like Illustration Friday, only instead of just showcasing your work, you can also potentially win money.
Istockphoto: This site is one of the classiest sites, but since the sales have slowed in recent months, it's not at the top of my list. Each sale is around $3 and they really scrutinize each illustration. I have over 700 images on Shutterstock, but only 112 on Istockphoto (because the cheaper stuff gets turned down). The other thing too is that Istockphoto doesn't have a referral program. If you sign up by clicking on one of these links, I'll get a taste of your success - and it's not money that comes out of your royalties, but extra icing on top! It's tasty for all involved. Except Istockphoto. They don't care about referrals or people.
There are many more sites, but those are the top three.