For my fantasy world Grundet: juhhmi.deviantart.com/gallery/…
The quick guide and terrible diphthong table.
edit1: Developed by the monks of ? for their sacred texts
edit2: The hexagonal script was constructed to be used with Rinapri during the Age of Coast Temples, and it survives only as the most sacred script with decorationally complex orthography, various writing direction combinations and secret messages opening for those with the Eye. Hexagonal texts cover walls of coast temples and spells are carved onto amulets.