How do you emulate a brush tool?

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  • Updated 12 months ago
A brush tool - AFAIK this has been asked for many times in the past, but for one reason or the other it never landed in a year end voting list.

Q: how to emulate the brush?
Erase and fill isn't always a success.

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Posted 12 months ago

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Photo of Paul


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I would use either the Eraser tool or the polygonal select and delete

By default, I use the latter

What would a brush tool do that those don't?
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As you can see above, when using eraser and filling, it'll leave a thin white line for some reason.
I tried the polygonal selection, repeatedly, but it did not work.
When I start within the white space but go outside the picture when selecting (i.e. a triangle somewhat larger then the green triangle involved) then within the white area some portion is selected, but not the green triangle.

Meanwhile I went on to do some further checking on other tools.
Found out PicPick has a brush tool, same as PhotoFiltre v7.2.1 portable freeware.
They work fine.

As I don't expect SnagItEditor will include a brush tool soon (good chance it will never include it) I'll use one of the above for that purpose.

Thanks for your response.

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Joe Morgan

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Paul's right about using the polygon selection tool.

I saved your image and see the problem. You need to zoom in to max level of 2,000%.
Or the highest level of zoom you monitor will accommodate. That allows you to see the entire triangle.

They applied a fading edge to the left side of the triangle. The pixels don't line up in a perfectly straight line.

So you need to select beyond the upper and lower corners to encompass the triangle. You may need to deselect and re-draw your selection to get the selection right. But it's doable, and not that difficult.


The diagonal edge doesn't feather as cleanly as Photoshop.

Aside from someone like myself, nobody else will be looking at your image at a zoom level and know the difference {:>)

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Many thanks indeed.
I gave another try and figure that, initially, I went a little too far away/outside the area that i wanted to select.

I tried again just now and made screenshots of it.

The first one is too far off from the area and then it selects 'some' white area (see arrow)
A more precise selection gets the correct selection.

Whilst it is a matter of taste of course, I still feel a brush tool is somewhat handier and should be available within SnagItEditor. 
See PhotoFiltre v7 video.

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Rick Grunwald

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Have you tried using the pen tool for your brushing needs? I find it works well for general painting
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Many thanks indeed for the suggestion Rick!