The main window with a simulation showing layers in a silo (bottom-right), the rules editor (top-right), and the zoning editor showing all available shapes : rectangle, ellipse, polygon - each one having its own mix of phases quantities. (left)
Designing a scene, then editing a phase (our abstraction for a `type of matter') and modifying its color.
Designing quite complex borders, with all available shapes: lines, arcs of
ellipses, ellipses, polygons - each one being blue or red, according to the
`seal' property.
