GIMP paintbrush not working [Full Fix]

How can I fix GIMP’s paintbrush?

1. Select RGB mode

  1. Open your GIMP software.
  2. Click the Image menu at the top of GIMP’s window.
  3. Select the Mode submenu shown directly below.
    RGB option gimp paint brush not working
  4. Select RGB on the Mode submenu if it’s not already selected.

Note: The above resolution is for fixing the paintbrush when it paints a different color from the one you’ve selected. If you can’t paint anything at all in GIMP, try fixing its paintbrush with the resolutions below.

2. Check you’ve got the right layer selected

If you have multiple layers, make sure your top one is selected. If you’ve got a lower layer selected, the paint will be applied to that instead of the visible top one.

GIMP's layer options gimp paint brush not working

GIMP’s right sidebar displays your layers. Select the top layer there if it’s not selected, and then try painting.

You can also move layers up and down the stack by clicking the up and down arrows at the bottom of the right sidebar.

3. Check your brush settings

  1. To check your brush settings, click the Paintbrush Tool button. Then look at the values on the Paintbrush sidebar shown directly below.
  2. Drag the Brush Size bar to the right to increase its value if it’s too low.
    Brush Size bar gimp paint brush not working
  3. Also, drag the Brush Hardness bar further right if its current value is very low.
  4. Then try painting with the expanded and hardened brush.

4. Check if Clipboard Image is selected

GIMP’s Clipboard Image and Mask brushes don’t paint anything onto layers. So, the paintbrush isn’t much good when you’ve got either of those brushes selected.

To check what brush is selected, have a look at the brush selection panel on the right sidebar shown in the snapshot directly below. That panel includes a wide range of brush choices.

The brush options gimp paint brush not working

Select an alternative brush there that isn’t Clipboard Image or Clipboard Mask. Then paint something onto a canvas with the selected brush style.

5. Select the None option

  1. To ensure nothing else is selected, click GIMP’s Select menu.
  2. Select the None option on that menu to deselect everything.
    The None option gimp paint brush not working
  3. Thereafter, try painting on the canvas.

This resolution will ensure there aren’t any small rectangular selections selected on your canvas. When there are very small rectangular regions selected, you can’t paint outside them.

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