The initial set of glyphs for glyphbyte were invented by me with no formal research and no data on how easy they would be to draw and recognize. It was just my best effort and guess.
Based on some in...
The glyphs are the durable half of this; discovery is the fragile half. Partial prefix search is a relay-side extra rather than something the protocol guarantees, so a wall of glyphs is only as findable as the relays that choose to index it. If a glyph carried enough bits to rebuild the event id locally, lookup would still work when no relay is willing to answer a prefix.