Art 21, Serra

Last night I watched an old episode of Art 21, which was originally presented by PBS during the early part of the new century.  Richard Serra was one of the artists mentioned, and it showed him sketching some of his work in his journal.  At least for the drawings made during the filming of this documentary, Serra's line-work is as subtle as his building material.  That seems appropriate, but thinking of either of those doesn't really give you a  feeling of actually encountering his work, which has a great deal of subtlety in how it affects one's senses.