I have been playing around in GIMP (GNU Image Manipulation Program) https://www.gimp.org/ and created replacement spell runes for Skyrim SE, from the original game we have; Fire, Frost and Shock and from the Dragonborn DLC; Ash, Frenzy and Poison.
I like the look of them and they show up in game nicely and they are all saved in DXT5 compression format.
The Special Edition version can be found here https://www.nexusmods.com/skyrimspecialedition/mods/28561
The runes came to be from brushes I got for GIMP from Obsidian Dawn and they are beautiful.
Inside the folder,
Txt file with credits back to original creator of the brushes
If you like them please endorse it would mean a lot. Thanks and enjoy.
Obsidian Dawn brushes
Obsidian Dawn https://www.obsidiandawn.com/
Original URL: https://www.nexusmods.com/skyrim/mods/99140