So, I spent a bit more time with the iPad and Procreate. Works beautifully for an amateur coming from graphite and colored pencil. Here is my eye. Not sure how much time. Maybe 5-6 hours or so. Part of that is learning Procreate as well as the pencil.
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That is a bit much for me because I'm squeamish about eyes, but I had to 'like' it. That's incredible! Are you really an amateur? Please tell me you're an artist who's being paid vast sums of money for your work! 'Wow' doesn't really cover the awe I have for what you've just shared with us.