A sign was attached to the glass of a window covered with a mural. The sign read:

Artspan
Transit Mural Project
Nathan Richard Phelps
nathanrichardphelps.com @nathanrichardphelps
ArtSpan.org @artspan

The mural by Nathan Richard Phelps extended horizontally over a dozen window panes. It seemed to suggest the powerful sounds coming from an ear-wrenching loud speaker at a rave.

The center of this Nathan Richard Phelps mural appeared brighter than it actually was.

A pair of doors lay at the extreme left of the Nathan Richard Phelps mural on the Salesforce Transbay Center. The design ran through the door and out the other side.

A view of the Salesforce Transbay Center's Nathan Richard Phelps mural from inside the building looking out at the alley on the other side.

A much closer view of the Nathan Richard Phelps mural on the Salesforce Transbay Transit Center. Notice how precise the curves were and how sharp and clear the points were.

A closer view of the center of the Nathan Richard Phelps mural on the Salesforce Transbay Transit Center. Almost totally white, just a few black spaces poked in from the edges.