This GIMP (GNU) tutorial demonstrates how to create a Lava Background.
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.
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).
Launch GIMP & Organise Its Workspace & Palettes
Create a New Image, and set the following Width and Height dimensions; (File then New - Ctrl then N).
Alternatively, select equal Height and Width dimensions of your choice.
Then from the top menu, choose Filters then choose Render then choose Lava. And from the subsequent Lava dialogue box, experiment with the settings, and then click OK.
To finish, from the top menu, choose Image and then choose Flatten Image.
Congratulations, your Lava Background is complete, and it is ready to incorporate into your artwork.
Your image will benefit from a Sharpening Filter: Filters then Enhance.
Sharpen Images Tutorial
To save your Lava Background, from the top menu, then File then Save As.
Wendi E. M. Scarth. Top of Page.