This post describes a simple effect to produce images with (discontinuous) color variations, as can be seen below.
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Summary
We basically use several layers containing the original image and the modified images. This may or may not involve masks.
Steps
- Open the image; name it e.g. "original" layer
- Select an area on the image whose color you want to change; continue with [Edit]-->[Copy]
- Add a transparent layer; name it e.g. "var1" layer
- Click/activate "var1" layer, then [Edit]-->[Paste]
- Apply a "color" effect to var1 e.g. [Colors]-->[Invert] or [Colors]-->[Desaturate]
- Repeat the steps 2-5 to make another "discontinuity"
- You may also do the steps above with masks: duplicate the "original" layer, name it "var1a" then apply step 5; right-click "var1a" layer choose "Add Layer Mask" (use white color for the mask); apply step 2; activate the mask on "var1a" layer; fill the selection with black color (e.g. [Edit]-->[Fill with FG Color])
- If you want to have a smooth transition between colors, try [Filters]-->[Blur]-->[Gaussian Blur] on the mask
GIMP 2.4.6
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