Designers are using GH for renderings such as aligning props in the scene perpendicular to the camera. This is an experiment in trying to reproduce a certain graphic style for line drawings. This works well with straight lines. The VB component in the definition filters out non-linear curves.
Legend has it that, in the early days of CAD, a certain very large architectural company hired software developers to add "effects" to the clean lines of computer generated drawings so they would look more like hand-drawn. Here we are again. Funny isn't it?