I also have to make a blog for my design class before. But, I never learned about incidental lines before! D:
I had never heard of it before until my teacher taught us about it. I think a lot of the times teachers skip over it.
Aha, that's crazy. The magnum sharpie ones (Images 2 and 5 I think) were definitely my favourite. Ink would be cool, but like you said, the potential stuff damage could be devastating... Oh and you probably noticed but you have like a billion views on this picture lol
It's funny you should say that, because images 2 and 5 were the ones I submitted to the class critique! They're my favorites too! :3
(I submitted the link to reddit for the lols, but I didn't expect this many views! OAO )