Pattern Stamp Tool strangeness

[davidc1815]

I use the Pattern Stamp Tool (PST) from time to clone paint from photographs. I make a pattern from a whole layer image and paint from it, using the PST as a brush.  I set the tool to Aligned and Impressionist modes.  An oddity which I noticed some time ago but failed to investigate, cropped up again today working on a new picture.  That is, the top edge  - about a couple of mm - is shaved off the top and added to the bottom of the image.  So, I am painting from a pattern made from a (layer) image that has been shifted up a little.  You can see the effect that appears after painting from the pattern below:

(the top of the image)

(the bottom of the image)

You can see a thin band of sky appearing along the bottom of the image.

It is not the end of the world, but I am curious as to why it happens and if there is a simple way to ensure that pattern and derived image are all square.  I wondered if perhaps it is something to do with the Impressionist setting. You can see that "Aligned" is already selected.  Here are my tool bar settings:

Grateful for any advice.

David

[davescm · Accepted solution]

Hi David

I can get this to happen if I brush with the centre of the brush just off the canvas. It looks like it then treats the brush centre as a new "tile" of the image so if I brush along the top I am using the bottom of the new tile.

See below which is taken from an image with a dark top edge and light bottom edge

Brush centre just inside the image - no impact

Moving the brush centre just off the canvas and I pick up the image from the bottom

So the answer appears to be keep the brush centre just inside the image.

Edit to add : It only happens with the Impressionist setting checked

Dave

[davidc1815]

Dave - much obliged.  Thanks very much. If I select the layer I am painting into would that stop the "overbrush"?

David

[davescm]

Hi

Surprisingly, to me anyway, I tried "select all" on the layer to be painted earlier - fully expecting that to work. It didn't

Dave

[davidc1815]

Yes, I just tried it too and the brushed pattern still spills.  Hmm..

David