This GIMP (GNU) tutorial demonstrates how to produce a High Key effect using GIMP’s Softglow Filter. To work along, you are welcome to download the Start Image I am working with Here. Unzip the file and open the image onto GIMP’s workspace.
You can quickly Undo a step at any time by pressing Ctrl then Z. Alternatively, click a previous Undo History snapshot - Windows then Dockable Dialogues then click Undo History. In addition, to Zoom in (or Zoom out) of your image; from the top menu choose View then select a Zoom Tool from the subsequent drop-down list.
Understand Blend Modes
Launch GIMP & Organise Its Workspace & Palettes
Open your choice of Start Image onto GIMP’s workspace - File then Open - Ctrl then O.
Ensure the Layers and the Undo History Palettes are visible, and then drag them into position over your workspace - (Windows then Dockable Dialogues - then click Layers and Undo History).
Now, Duplicate the Background Layer by right-clicking over it and choosing Duplicate Layer from the subsequent drop-down list.
Then (working on the Background Copy Layer). From the top menu, choose Filters then choose Artistic and then choose Softglow. And from the subsequent Softglow dialogue box, enter the following settings, (or experiment): and then click OK.
4/ Understand Layers - Understand Blend Modes
Now, from the Layers Palette, change the Background Copy Layer’s Blend Mode from Normal to Hard Light.
For personal results, experiment with different Blend Modes and Layer Opacities.
Then from the top menu, choose Image and then choose Flatten Image.
Congratulations, your “High Key” Softglow Conversion is complete, and it is ready to save - top menu, then File then Save As. GIMP 2.8 - File then Export. Save Images Tutorial.
Your image will benefit from a Sharpening Filter: Filters then Enhance.
Sharpen Images Tutorial
Wendi E. M. Scarth. Top of Page.