is there a way to make the result from the blob brush automatically merge with the path it intersects? I am working on a project and sometimes it automatically merges, and other times it doesn't. It seems to be random.

What are the prerequisite conditions necessary to ensure that it merges?

1 Answer 1


Double-click the Blob Brush tool and change it's options.

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  • I have tried that but I think if you play with those options a lot (esp with a touch surface) you will find that it does not always suffice. After hours of working it haphazardly I by some happenstance realized that if the current fill is a solid with no stroke AND new art has basic appearance is unchecked in the appearance panel, new blob brush strokes will always merge with intersecting layers with the same fill options.
    – nikk wong
    Feb 20, 2019 at 5:15
  • The blob brush only works with stroke color. In fact, you can't use the blob brush tool without it applying a stroke color. If you set colors to no stroke and a fill, as soon as you let go of the mouse the color is moved to the stroke. -- I'm not claiming the settings are 100% intuitive. They are not. However with "Keep Selected" checked, anything with the blob brush should merge with all the current artwork. If you also check "Merge Only with Selection" then anything with the blob brush should only merge with the last blob brush stroke (and anything it merged with).
    – Scott
    Feb 20, 2019 at 5:28
  • Also realize this isn't the Adobe help center... if you aren't happy with how things work, that's certainly not the fault of anyone at this web site. I was merely showing you where to alter the settings.
    – Scott
    Feb 20, 2019 at 5:29

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