I customized GIMP's smudge tool, to make it not only smudge existing color on the canvas, but also blend brush color on it. Because I thought this can make a different taste from "Watercolor" type smudge when drawing images.
(I mainly use GIMP for painting, so the power of a brush engine is important to me.)
I did this by modifying GIMP's core codes and building by myself.

   
I added two parameters. One is "Flow", which controls the amount of brush color. The more it is, more foreground color will be blended. Of cource it can be controlled by brush dynamics. (To simplify the work I picked a currently-unused parameter and didn't make a new one.)

The other is "No erasing effect". If enabled, if smudging will decrease alpha of some pixels, don't decrease them, thus don't erase existing pixels. This is useful to fill the gap between two color areas.

Currently I made this just for experiment and it's not very robust. If someone agrees to make this as an official feature, I may talk to GIMP developers.

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Here are some tests. Also compare this smudge tool and MyPaint brush(which is watercolor type smudge).

   
It's better to keep Flow under 30, or control it by dynamics. Otherwise it will be nearly the same as normal brushes.

Two artworks with similar painting method, only different tools.
by customized smudge tool
   
(Tip: smudge tool is very useful to draw hair and flames)

by MyPaint brush
   

And this shows why "No erasing effect" matters.
   
In the left image, there are transparent gaps between dark gray and red areas. Without "No erasing effect", smudging on the gap will diffuse its transparency to nearby pixels and it's difficult to remove the gap.
"No erasing effect" may be useful in watercolor type smudge too. Havn't tried yet.

(Also posted at http://www.gimpusers.com.)

Hi everyone. I am a programmer living in Taiwan, but do some digital painting for hobby. So my main usage of GIMP is painting.
Besides Chinese, I can read Japanese too.

My programming and art works were posted here (No English site sorry)
Bahamut (Traditional Chinese)
https://home.gamer.com.tw/shark0r
pixiv (Japanese)
http://www.pixiv.net/member.php?id=1797692

Here is my recent work
   
pixiv link
By Inkscape 0.92 and GIMP 2.9.5
She is Kasane Teto (重音テト), an UTAU character.
Also a practice of newly-added MyPaint brush. Adjusted its setting to make it like Watercolor tool in many Japanese softwares.


And an older one.

   
pixiv link
The character is Xin Hua (心華), A Vocaloid character from Taiwan.
It took me many days. Currently I have no time to draw another such a complex artwork.

I have the Kosher "GIMP" and it's 'HELP' files up and running now thanks to ofnuts and rich2005 !

NOW comes the myriad questions I'll be asking...............

First couple -

Does GIMP 'HELP' have a search function ?
For instance - I'd like to know if there is a 'Line Drawing' function in GIMP.

I tried inserting text into a picture (I do a lot of Reloading Forums for old 1800's English firearms)
and I take and edit pictures A LOT .

I want to underline some text, so a line drawing Function is needed (for emphasis - like THIS)

On other (less good as GIMP), drawing a Horizontal line - the Shift key KEEPS the line Horizontal...
Does GIMP have such a method of keeping the line horizontal (or vertical) ?


DoctorBill

Hello guys
I'm pretty new at gimp. I been using it for about a month.
Anyway i pressed some shortcut and now I can't see selection lines.
When I click Rectangle Select tool and I start dragging on the image I can't see any lines. When I let go of the mouse button they appear. Also when I try to re size selection those lines disappear.
This didn't happen before.

This Is what I mean. On the first image I clicked on top left side and dragged to bottom right. I can't see any lines.

On the second image I let go of mouse button and selection appears.

I tried a lot of thing, and search the internet but couldn't find solution. I reinstall the program but it didn't help.
Any ideas.

I just migrated to Windows 7 against my will and lost older programs that worked on XP (PhotoShop LT).

I downloaded and am trying to learn GIMP !

GIMP's "Help" doesn't work, so I found a link to GIMP HELP (English) on GIMP Downloads.

I downloaded the Help Setup Program and when I ran it, it ask WHERE to set up the Help.

When I enter GIMPSHOP (in my Programs Directory), it says GIMP isn't there !

When I enter .....users/pc/.gimp-2.8, it says GIMP isn't there either !

Where do I tell the installer to put the Help Files ?

DoctorBill     (I am a 74 years old retired Chemist PhD)

First, a little background.  I have limited experience with graphics manipulation, but I need to get this figured out for a project I'm working on.

The attached image was scanned from an old pinball playfield that I am restoring.  I have the image saved as a 600 ppi BMP.

The goal is to remove all color except for the black outlines on the car so I can print a waterslide decal of just the black line drawing of the car.  I'll physically repaint the base colors of the car then apply the waterslide decal to add the details back in.

What is the best way to accomplish getting a black and white line drawing?

Thanks in advance.

Attached Files

Thumbnail(s)
   

I searched current questions but cannot find any reference to my problem here ..
it is 
For some reason (Overnight Basically) when I open GIMP, I get between 6 and 7 entry point errors. One of them is .......
One if them is 
The procedure entry point _cxa_throw_bad_array_new_length could not be located in the dynamic Link Library 
C:\Program Files\GIMP2\bin\icui18n56.dll

  I updated my GIMP 2.8.16 and installed 2.8.20, but still get all the same errors. It was working perfectly just a day or so ago, and now each time I go to use GIMP, I have to hit "OK" at least 6 or 7 time to start the program. 
Would appreciate some assistance on this one.
Many Thanks and regards
Gary

I lost the original configuration of the gimp windows.
How can I find them?
Thank you.

Using Windows 10 and Gimp 2.8  When I look at the properties of a .png image on my desktop is says it is 377KB  but when I open it in GIMP underneath the canvas it says image.png (2.7 MB)
It's not a problem, I'm just wondering, why the difference ?

SYMMETRY*infinity =

"It would be GREAT to be able to pick the CENTER of the symmetry activity...  and to pick MULTIPLE centers...  also, it would be good to be able to pick N divisions  to symmetry-ize...  or an "angle"...  what if you wanted to do 60 degree?  or 30?  or any 360/N symmetry?  AND be able to choose the CENTER(s) of the symmetry?  For example if i wanted to do guilding type decoration/drawing...  i could drop X number of "pins", and by drawing near one pin, the brushstrokes/tool-action would be replicated around the other pins in the same scale and with the same 360/N (with a 'phase' (rotation)) symmetry.

If i did 360/2, at 0 degree phase, i'd get left right mirroring...  if i did 360/2 at 90 degree phase (rotation), i'd get vertical mirroring, if i did 360/4, at either 0, or no degree phase, i'd get horizontal and vertical symmetry...  and if i did the same with the phase set to 45 degree phase, i'd gate "X" patterned symmetry, instead of "+"...

And if i did 360/3...  or 360/6, etc...  i could get nearly infinite symmetry options...

where is the official feature requests/suggestions area if the interwebz?