Hi to all,

I found s.th. like a mistake in gimp, is this a already well-known bug?

I described it here:

http://www.art-printings.com/gimp.htm

I don't think I could replicate your problem, see http://members.pcug.org.au/~rcook/images/Smudge.ogv

This was with Gimp-2.6.6 on Ubuntu-9.04

Quoting blacktoon :

I found s.th. like a mistake in gimp, is this a already well-known bug?

I described it here:

http://www.art-printings.com/gimp.htm

Not really a bug. You are misconstruing the action of the Smudge Tool. GIMP's smudge only smears the colors that already exist on the canvas; whereas it appears that MyPaint introduces some amount of the foreground color to the start of the smudge operation. Without introducing new color to the canvas, the laws of entropy dictate that repeated application of the Smudge Tool will have a dimensioning effect (this is what you describe as the canvas being "frozen").

Your assertion that "every other image manipul.app" behaves like MyPaint is not to my knowledge entirely accurate. Coral Painter behaves the same as GIMP; and Photoshop's default smudge behavior is identical to GIMP unless you choose the "Fingerpaint" option (which makes it behave like MyPaint).

Perhaps you wish to propose enhancing GIMP's Smudge Tool by adding an option to introduce some amount of the foreground color at the start of the smudging; but until such an enhancement is supplied, a ready work-around is to manually paint a spot with the paintbrush and then switch to the Smudge Tool to smear that spot.