Jacy designed icons for popover editors in Flow, software used by shaders at Pixar. These icons were intended to be 21x21 pixels, in varying opacities of white. In addition to summing up complex technical functionality, these icons needed to fit in the family of icons designed in the Presto Refresh. It proved to be a difficult design challenge!
You can see Jacy's IP icons implement in the SL app bar, center screen:
