Icons or graphics are central to visual absractions for explaining processes.
Flow charts (connecting the graphics) are central for explaining relationships and flows.
The natural result today from doing nested processes using zoom is flowcharts in flowcharts. This looks very UML-ish when zoomed out as it's only frames with blank (or miniscule content).
As a process developer, I would like to be able to substitute a frame/group/objects with a graphic/icon at a certain zoom level
This way I could have a pretty process, and upon zooming into objects they would "open" to show how that process would work in detail.
Some visual que would be needed to separate "boxes" from non-detailed "images"
Suggested implementation is a frame with "psudo/isometric 3D"-walls with a selectable graphic, "Set break point" (remembers zoom level) and a manual/close open upon selection.