Thanks for the comments. Guess I should give out a few more hints (note, I said hints since it will depend on the result and I do all these at the seat of my pants. lol). After Circlism finishes (around 4 games worth of Freecell for this one. lol), I dup the result then rund G'MIC's Local Orientation with a smoothness between .2 and .3. I set this result to Grain Merge, then dup the Circlism result, move it to the top and set it to Hue (or Color; depends on how much saturation I want) and also dup this setting the top layer to Lighten and play with the Opacity of this layer too. For the result here, I also blurred the result of the Local Orientation rendered layer. Now I did some other nuances too (some Inkscape filters and such; don't ask me which since I don't exactly remember but thing it was the Refractive Gel B preset, but I'm not going to play 4 more games of FreeCell to find out. lol). Also, I did run my G'MIC Soft Focus preset to enhance the contrast too. Again, like I said, seat of my pants. lol
Definite, if it wasn't for G'MIC, I could not do this render, so again, thanks to the vacationing David for creating these cool presets in G'MIC (not to mention G'MIC itself; lol).