This is a sidebar issue, reflecting on a issue that my friend Rick Catizone brought up.
Rick was concerned about the near-tangents in one of Moebius‘ pieces. I answered that what Jean did might have been deliberate.
I learned something about tangents when I was working on a mammoth picture for a book cover. In art school we were told to always avoid them (tangents, not mammoths). I accidentally discovered one way to positively use them.
This is the uncropped version of my mammoth cover painting. In trying to figure out where to crop the art for publication, I experimented with different croppings. The one that amazed me (because what happened so went against what I was taught in art school) was this one:
I found that putting the outer vertical edges as close as I could to the outer curve of the mammoth’s tusks, by creating that near-tangent, my picture suddenly appeared three-dimensional. The visual tension/vibration created by the close proximity of the tusks to the border perimeter made the tusks look as if they were coming out of the picture.
That was the cropping I ended up using for the cover.
Now, back to Moebius.