This GIMP (GNU) tutorial demonstrates how to create a Colourised Curtain Effect.
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.
Launch GIMP & Organise Its Workspace & Palettes
Create a New Image, and set the following settings, then click OK. (Ctrl then N).
Now, from the left-side Toolbox, activate the Blend Tool.
And set the following attributes into the Tool Options box. I have selected a
Gradient named Nauseating Headache. However, for personal results, it’s important to experiment with different Gradient and Blend Tool settings.
Now, left-click over the white canvas’s right-side, and drag out a “Gradient Line” in the direction indicated below. Then release the mouse button.
(Ctrl-clicking keeps the line straight).
Congratulations, your colourised curtain effect is complete, and it is ready to save - top menu, then File then Save As. GIMP 2.8 - File then Export.
Wendi E. M. Scarth. Top of Page.