Blob brush options
Last updated on
Sep 11, 2025
Explore various Blob brush options and best practices to use the tool more effectively in the designs.
Double-click the Blob Brush tool in the Tools panel to set its options.
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Function |
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Keep Selected |
Keeps all paths selected as you continue to draw a merged path.
Tip
This option is useful for viewing all paths that are included in the merged path. |
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Merge Only with Selection |
Specifies that new strokes merge only with the current selected path. |
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Fidelity |
Controls how far you have to move the mouse or stylus before Illustrator adds a new anchor point to the path. |
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Size |
Sets the brush size. |
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Angle |
Sets the angle of rotation for the brush. |
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Roundness |
Sets the roundness of the brush. |
Blob Brush tool guidelines
Follow these guidelines while using the Blob Brush tool:
- To merge paths, they must be adjacent in stacking order.
- To merge Blob Brush paths with existing artwork, ensure that the artwork has the same Fill color and no Stroke, as the Blob Brush tool creates paths with a Fill and no Stroke.
- To apply paint attributes (such as Effects or Transparency) to the Blob Brush tool, select the brush and set the attributes in the Appearance panel before drawing.
- To merge paths created by other tools, ensure that the existing artwork does not have a Stroke. Then, set up the Blob Brush tool to have the same Fill color and draw a new path that intersects all the paths you want to merge.
- To merge new paths with the topmost matching path encountered, ensure that the paths are drawn using the Blob Brush tool. If the new path touches more than one matching path within the same group or layer, all intersecting paths are merged.
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