This GIMP (GNU) tutorial demonstrates how to enlarge muscles using GIMP’s IWarp 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.
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).
Comprehensive IWarp Instructions
Launch GIMP & Organise Its Workspace & Palettes
Open your choice of Start Image onto GIMP’s workspace - File then Open - Ctrl then O.
Now, from the top menu, choose Filters then choose Distorts and then choose IWarp.
A separate IWarp dialogue box will open, (as illustrated below), and you will be working within this dialogue box, from now on.
Now, to enlarge (Grow) pixels, mark the following Deform Mode Grow settings, and then repeatedly left-click over a muscle area of your choice.
For Comprehensive IWarp Information: Click Here.
When enlarging the muscles, to enable better control, you are better off repeatedly left-clicking to enlarge the pixels, rather than dragging your cursor over the area.
(Don’t click OK).
To Undo a distortion, mark the following Remove Deform Mode setting, then
left-click and drag your cursor over the pixels you would like to “reform”.
Shrink Pixels Example
If you have enlarged areas in error, for the example around the face and head, then simply change the Deform Mode setting to Shrink and reduce the Deform radius, (the IWarps size), and carefully remove the unwanted enlarged pixels.
When you are happy with the amount of distortion, click OK.
To create extra impact, apply a Sharpening Filter of your choice - Filters then Enhance.
Congratulations, your Muscle Enlarging Conversion is complete, and it’s ready to optimise and save. (Top menu, then File then Save As. GIMP 2.8 - File then Export. Save Images Tutorial).
Now you are more familiar with this technique, you can have lots of fun enlarging, reducing muscles.
Wendi E. M. Scarth. Top of Page.