code/controllers/subsystem/overlays.dm

| /proc/overlays2text | Converts an overlay list into text for debug printing Of note: overlays aren't actually mutable appearances, they're just appearances Don't have access to that type tho, so this is the best you're gonna get |
|---|---|
| /atom | The base type for nearly all physical objects in SS13 |
| /proc/diff_appearances | Takes two appearances as args, prints out, logs, and returns a text representation of their differences Including suboverlays |