molly: thank you
! i used a turbulent solid noise layer colourised, ran the g'mic water filter (in deformations) on it and then made a plain layer in the same colour above it, ran samj*s couleurs metalliques on it and put it in overlay mode. probably unnecessarily complicated for something so simple
.
i said i would explain about the glass effect, so here goes:
i used a very slightly tweaked version of the same glass technique i used on the text in my "shards of glass" image (
http://www.gimpchat.com/viewtopic.php?f=11&t=7116&start=10). the reason the two images look so different is just that i started from a patterned image this time and when i was done with the glass i ran jayprich's specular bumps filter (g'mic-> testing -> jayprich) on the base image to get some extra highlights. both here and in "shards of glass" i used kward's glass script for the basic glass layers.
about a tutorial for the knotwork: i used knotworker to make the basic knot, in gimp i only made a path from the original image and then edited the path - no point in writing a tutorial for that.