
Here's the notes from Flickr.
No Pressure
This is the sample art for G'Mic "Make squiggly" filter. Principle of squiggling is simple. Just add spread noise and detect edges. Combine edges with original colors and you have a squiggly.
Layer stack is
8. BG copy-CurveAdjusted (Difference 24.7)
7. B-TR-Color (Normal 25.9)
6. A-TR-Color (Multiply 60.8)
5. copy visible-after A (movedown to this pos, Overlay 100)
4. BG-Copy-Masked (Overlay 100)
3. BG-Copy (Overlay 100)
2 .600x815-[G'MIC] Make Squiggly : -gimp_Squiggly 0,15,3,1,0.7,1,1,0,4,0.2,0.4,10,0.55,0 (normal 100)
1. BG
Explanation of layers
1. Background is Luminance Mantiuk tonemapped single exposure with following parameters
- Pregamma_1
- Mantiuk06
- contrast_mapping_0.1
- saturation_factor_0.6
- detail_factor_2
2. Make Squiggly filtered layer but I took a separate copy for squiggling and scaled it down to 600x815 px before applying the filter. This is how I got the squiggly coarse. After applying the filter I scaled the copy back to original size and copied the layer back to the original image.
3. Overlay to enhance the colors and contrast
4. Overlay to further enhance the colors and contrast. Mask is white on the windows and background wall portion and black for the foreground objects.
6. Transparent layer with dark blue color on the foreground pressure vessel portion.
7. Transparent layer with black in the too light regions of the background.
5. Visible copy taken at this point. Layer was moved down two steps for better effect.
8. Copy of 1. (bg) in difference mode to soften the image and to make the glow in to the windows.