Obsidian is a symbol hybrid painting to help with the complexities of the DragonLords project and was created during the writing of The DragonLords.
It has Rix's Obsidian Knife as the starting point so it's technically a hybrid but that's as close as you can get to a real symbol painting. Couldn't have done this project without it.
This is Rix, from The DragonLords:
Rix's obsidian knife under construction
Obsidian Symbol Hybrid Painting 30x40, acrylics on canvas, October 2012 by Silvia Hartmann