Viewing Conventions

The drawing is line-graph based. To improve viewing, the following convention is adopted:

1. Objects (except for phototubes) at the rear have a darker hue than the ones in the front. For example, the front PSUP is drawn with a bright red color but the rear parts are in a much darker red.

2. For the phototubes (represented by small hexagons) the solid-filled ones are closer to the viewer and the hollow ones are further away to the back.