This GIMP (GNU) tutorial demonstrates how to create and save a Rainbow Coloured Picture Brush. To work along, you are welcome to download the Transparent Start Image
I am working with Here. Unzip the file and open the image onto GIMP’s workspace.
Read GIMP’s Comprehensive Brush Notes Here
Create, Save & Apply A Sparkle Brush
Create A Custom Brush From A Photograph
Create A Custom Brush From A Photo Object
Create, Save & Apply A Copyright Signature Brush
Create A Brush From A Transparent Clipboard Image
Change The Picture Brush’s Spacing
Apply Your Newly Created Picture Brush
Play An Animation Of Your Picture Brush
Save Your Transparent Object As A Custom Brush
Create A Seven Layered Multi Coloured Picture Brush
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
Open the Transparent Pipe 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).
Brush Palette Note
To bring up the Brushes Palette, from the top menu, choose Windows then choose Dockable Dialogues and then choose Brushes.
Transparent Object Note
Before saving an object as a Brush, it needs to have a Transparent Background. If your circular object doesn’t have a transparent background, you need to remove its background first. My Brush Tutorial Here, demonstrates how to remove an object’s background.
Now, right-click over the Background Layer, and select Duplicate Layer from the subsequent drop-down list. Then repeat this a further five times. You should now have seven identical Layers in the Layers Palette, as demonstrated below.
You are looking to alter the seven orbs’ colours. Therefore, activate the Top Layer - as illustrated above. Then from the top menu, choose Colours then choose Colourise. And from the subsequent Colourise dialogue box, create the following Red Colour by moving the Hue and Saturation sliders, and then click OK.
4/ Understand Layers
Now, hide the Top Layer’s Visibility by clicking away (toggling) its Eye Icon. And then activate the Second Layer - as illustrated below.
Then again from the top menu, choose Colours then choose Colourise. And from the subsequent Colourise dialogue box, create the following Orange Colour, and then click OK.
Now, hide the Second Layer’s Visibility. Then activate the Third Layer. Then Colourise the Third Layer’s Orb. This time, I am choosing Yellow. (Hue 58, Saturation 70).
Then, in exactly the same way as you did with the First, Second and Third Orb Layers: activate and then change the Fourth, Fifth, Six and Seventh Layer’s Orbs. I changed mine to Green, Blue, Indigo and Violet respectively.
After you have completed this, your Layers Palette will resemble the following.
Click back each Layer’s Visibility Eye Icon. Then activate the Top Layer.
Now is a good time to save your Layered Image as a XCF File.
Now you have created your multiple (Transparent) Layers, you are ready for the next step.
9/ Save Your Transparent Orbs As A Picture Brush
To save your Seven Layered Image as a Picture Brush: from the top menu, choose File and then choose Save As. And from the subsequent Save Image dialogue box, click open the Select File Type menu, and from the subsequent drop-down list, click GIMP brush (Animated) - gih. (Don’t click Save).
Then navigate to and open GIMP’s Brushes Folder; (Program Files, then
GIMP-2.0 then share then gimp then 2.0 the brushes). After you have navigated to and opened GIMPs brushes folder, click Save - as illustrated below.
Now, from the subsequent Save as Brush Pipe dialogue box, enter a unique name for your Brush. Now, change the Ranks to 7. (Changing the Ranks to 7 lets GIMP know that the Brush has Seven Layers). Then finish by clicking Save.
Congratulations, you have successfully created and saved your Multi Coloured Picture Brush and it is ready to apply.
To see your new Brush, (from the foot of the Brushes Palette) click the Refresh Brushes tab.
Then activate your newly created Rainbow Picture Brush by clicking its icon.
Play Picture Brush Animation
If you left-click and hold over your Rainbow Picture Brush - as illustrated below left: Gimp will animate the seven coloured orbs - as illustrated below right.
Your Brush is now ready to apply, in the usual manner.
If you would like the multi coloured orbs to be closer together, then reduce the Picture Brush’s Spacing to around 1.
If you would like the orbs to be farther away from each other, then increase the Spacing value. As always, experiment and discover the best Spacing value for you.
My tutorial Here demonstrates how to apply Brushes.
You can quickly Resize your Brush by tapping the Bracket Keys.
Create A Brush From A Transparent Clipboard Image
Whenever you Copy an image, it is copied to what is known as a Clipboard. If the image is transparent, and you would like to save it as a Brush; then, first Copy your image to the Clipboard - top menu, then Image then Copy.
Then, from the top menu, choose Edit then choose Paste as and then choose New Brush.
Now, from the subsequent Script-Fu: New Brush dialogue box, enter a unique name for your Brush, and then click OK.
Congratulation’s, your Clipboard Brush has been saved and it is ready to utilise in the usual manner.
To permanently save your Clipboard Brush to GIMP’s Brushes Folder, apply your Brush onto a Transparent (Single) Layer. Then save it (top menu, then File then Save As) as a GIMP Brush gbr File, as Demonstrated Here.
Final Note (Back Up Your Brushes Folder)
Your Picture Brush has been saved to GIMP’s Brushes Folder; however, it’s always good practice to backup GIMP’s Brushes regularly. Backing up this folder preserves your newly created brushes should you need to reinstall your operating system.
Wendi E. M. Scarth. Top of Page.