Questions about GIMP, the GNU Image Manipulation Program. It is a freely distributed piece of software for such tasks as photo retouching, image composition and image authoring. Ask scripting questions on Stack Overflow, software support questions on Super User, and anything related to design here ...

learn more… | top users | synonyms

13
votes
2answers
10k views

Why does my transparent PNG not look good?

I want to convert a JPG to transparent and using GIMP I added alpha layers and transparency same way I make a GIF transparent I converted it to PNG but it doesn't display well when I load it on my ...
2
votes
1answer
77 views

Using GIMP to extract a background from a set of pictures

I've got a set of pictures of a group of people that were taken on a tripod. Some of the people moved between pictures, and I want to extract a common background so I can combine the backgrounds to ...
3
votes
1answer
56 views

How to make PNG-quality animations in GIF format?

I've noticed more and more sites using animated GIFs that have PNG quality. You'd think they're the latter if you didn't check the image info. The lines are crisp, the colors look great, there's none ...
3
votes
2answers
906 views

GIMP: the closest thing to Photoshop's smart object?

I've been learning GIMP as an alternative to Photoshop, which I haven't been using for design purposes for more than 5 years now. I discovered that there is a new interesting thing called the smart ...
0
votes
1answer
33 views

Gimp – blend between layers controlled by a heightmap

Suppose, I have a gray-scaled height map and ten layers with different diffuse textures or solid color textures. I would like to blend these texture layers in a way determined by the heightmap, as ...
2
votes
2answers
31 views

Gimp 2.6.12: modify alpha channel while preserving color

This is for a video game in which a specularity mask is in the alpha channel of the normalmap. I need to create an image where the alpha value for some pixels are 0 (to indicate no specularity,) but ...
0
votes
1answer
26 views

How can I modify text/shapes created early and have effects previously built on those elements propagate automatically?

I have an image with the effect of wooden text inlaid within another species of wood. I would now like to change the text. However, I would then need to reapply all of the layer masking, resizing ...
2
votes
1answer
101 views

how can I collaborate using GIMP2?

most of the collab tools for drawing that I've seen so far cost too much, and lack features. GIMP does everything that I want, but unfortunately I don't know of a way to draw with 2 or more people ...
0
votes
0answers
21 views

Gimp paintbrush blendmodes usage

While I can understand singularly every blend mode of the paintbrush from the math point of view, I cannot find a use for most of them (the only ones I used are for drawing a castle and these were ...
1
vote
2answers
3k views

Why can't I fill a selection with color using GIMP?

I am quite new to GIMP. I created some text and set it along a path. I created a selection with the same shape as my text. If I try to fill this selection with a color (Cmd. or Cmd,) GIMP appears to ...
0
votes
0answers
29 views

Change the blue shades to white shades

I have an image of many different colors. I want to turn anything that is predominantly blue into being predominantly white, while leaving the other colors unchanged. So if the RGB of the image has ...
0
votes
1answer
24 views

How Can I View Applied Filters in Gimp

I would like to see the filters that are applied to a (text or image) layer in GIMP. Is this possible? Thanks in advance
0
votes
3answers
476 views

How to put a new picture in an iPhone image frame

I want to change the screen part of this Iphone image with the screen capture of my own app. I'm trying to do this in Gimp (unless there is a better way?). However, I can't seem to just copy paste my ...
0
votes
2answers
139 views

Photoshop - clear color data from transparent pixels

I have some images that have some transparent grey pixels, and when I make the picture larger, thoose pixels are visible a little bit. Is there a way to do this with Photoshop? In GIMP you can ...
1
vote
2answers
88 views

How do I create an 8 x 8 square brush in GIMP?

How do I create an 8x8 square brush, with no smoothing in GIMP? Do I actually have to create a custom brush? You'd think that the pencil brush would work but the size seemingly doesn't line up with ...
2
votes
2answers
31 views

GIMP: Toggle show/hide all non print extras

In GIMP, is there a way to quickly toggle all visible guides, grids, selection boxes, etc that are cluttering the display? I'm hoping there's something that's one key stroke instead of the way I ...
0
votes
0answers
5 views

Gimp reopens immediately after minimizing (Mac OSX) [migrated]

When I press the minimize button, the program slides down into the dock, then instantaneously re-expands itself. Has anyone encountered this before, or does anyone have any idea as to what could be ...
0
votes
2answers
321 views

Swap Colors (not Invert them) in Gimp

I know how to Invert Colors but is it possible to swap Colors? For example from this one: To this one: So that I select one Area and then swap Colors (or even the full Layer/Picture)? By the way ...
1
vote
1answer
41 views

Erase a single pixel in GIMP

I am trying to illustrate in GIMP 2.8 with pixel-perfect precision. The pencil tool allows me to fill in a single pixel without any fuzzy edges or anti-aliasing. However, the eraser tool operates more ...
6
votes
5answers
762 views

Convert image into mask

I have a green background picture with some shadows. I would like to use it as a mask so I can place it on background with any color (e.g. red or pink) and get the same style of shadows. I tried ...
1
vote
4answers
2k views

How do you get transparent colour on Gimp?

In the colour selection I have been searching for a transparent option, but I can't find one. How can I do it?
2
votes
0answers
33 views

Is there any tool that gives the percentage occupied by an area in an image?

Is there any tool that gives the percentage occupied by an area in a image? Given the following image: Is there any kind of tool I can use to know the width in percent of the green and blue areas? ...
1
vote
1answer
216 views

Are Gimp's template sizes correct?

When I start a new project of a poster which is to be printed on an A4 paper, I select gimp's A4 dimension template, but as I recently found out, it is actually NOT A4. If I import the finished ...
1
vote
1answer
30 views

GIMP: Ellipse position from center

I know that I can create an ellipse from the center. However, inside the tool properties panel, "Position" refers to the top-left corner. How could I change its position based on its center point? I ...
3
votes
2answers
81 views

How to create an 16× error/difference image using GIMP or Photoshop

I need to create a quality comparison between two rendering methods by showing the difference of the results akin to figure 6 in [Walter et al. 2005] (p. 5): (Image copyright by Walter et al. 2005). ...
64
votes
3answers
302k views

Making the background of an image transparent in Gimp

I have some jpg images and I need for each of them to have a transparent background. I have GIMP as a graphic tool. I need to put them in a web page and I need to see just the main element and have ...
0
votes
1answer
49 views

How can I beat the browser when it comes to reducing image size?

Can't get my head around this. I tried several ways to reduce the pixel size of a logo in Gimp. However, the browser (either safari, firefox or chrome on my iMac) is always amazingly better reducing ...
0
votes
2answers
107 views

How to create a patterned image from existing shape in Gimp

I am hoping to create a simple logo for a new website using Gimp. I am working with two images and a short line of text. I have the following images: The map will be the background/filler of the ...
2
votes
1answer
34 views

How to have multiple views in single window mode using GIMP?

I'd like a real-time preview while editing icons in GIMP. I know that you can press View > New View to get a real-time preview window, however in single window mode gimp puts the preview in a ...
1
vote
0answers
92 views

How to do material design effects in GIMP

I have been trying like crazy to get the material design shadowing right. Below is the image I created using GIMP. I have the drop shadow, but I think it kind-of needs to go all around the circles and ...
2
votes
1answer
68 views

Gimp - How to loop a gif seamlessly?

So I'm new at editing and I'm trying to insert gifs but somehow it always ends up with a gap after the gif ends and looks weird, I have no idea how can I change that :/ can anyone help me please?
0
votes
1answer
333 views

How to paste / edit text in a PNG file using Gimp?

I have brought a PNG file off the Etsy website, and I want to add text on top of it, but once I added text it all distorts and it is very bad quality, but in another instance it did not and the image ...
3
votes
2answers
75 views

Export PNG image without alpha channel in GIMP

How do I export a PNG image without alpha channel in GIMP? I have checked a lot, but I can’t find this. I found an option to export PNG images without alpha channel in Inkscape, but I am not familiar ...
2
votes
3answers
345 views

How can I combine two colored textures so that the final image is blended to match a specific lighting setup

I have been working on using Blender Cycles to bake textures for a game environment but the open source code that Sony provided is not optimized at all and because of this Cycles currently renders ...
0
votes
1answer
104 views

How to design a basic banner with GIMP?

I am using GIMP. And I want to design a very basic banner to be printed 3m long. The design is as simple as it could be : it consists of one logo that I have in pdf format (was designed by a ...
0
votes
0answers
19 views

how do I import an eps into GIMP with a different background color?

I'd like to import an image into GIMP and have it antialiaed with a custom background color. I don;t see a way to import an eps that doesn;t automatically set the color to anti-alias against as white. ...
0
votes
0answers
60 views

Round sharp edges of icon using GIMP or PIXLR

I am trying to make icon and small clip-arts to use in my app but the artwork I import has very sharp edges and they screw up the cleanliness of the app. How to buffer the edges I am using Pixlr ...
0
votes
1answer
42 views

Editing PNG in GIMP: is it possible to remove lines (used as arrows) and extrapolate the now blank squares?

I'm using GIMP to prepare this PNG file for vectorization in Inkscape. I've noticed that the vectorization process makes removing these lines far more tedious after the vectorization than before. ...
0
votes
0answers
33 views

Gimp always displays the wrong color for transparent layers

I have a problem (which I had previously on completely another Ubuntu and older versions of Gimp [now I have the latest - 2.8.10]). When I open PSDs with transparent layers, they get displayed in a ...
0
votes
1answer
37 views

How do I insert arrows into a picture in GIMP?

I'd like to insert perfect arrows (the sort you can make using Inkscape: straight, symmetric tips, of customizable width and length, etc.) into images in GIMP. At the moment the closest thing to this ...
0
votes
1answer
16 views

How do I unselect items in GIMP?

I'm currently using GIMP to add text captions and lines into a screenshot. The problem is that once I finished one caption I couldn't add any more lines (using the Paint Brush tool). If I close the ...
0
votes
1answer
57 views

How to edit jQWidgets png files?

I'm using GIMP to do the editing in the png file I've shown below. On selecting one of the arrows and trying to paint it red, the colour just does not turn red. It stays grey. I'm just unable to make ...
3
votes
5answers
3k views

Gimp: Pick color on screen without taking screenshot

Sometimes I want to quickly use a color that I see on a picture, website or program. I usually take a screenshot then open it in Gimp and use the "Color Picker" tool. Is there another way to do this ...
5
votes
0answers
79 views

Is there a way to select multiple sprites from a sprite sheet in GIMP?

After you've made the background transparent, color selected the background and inverted the selection to outline all the character sprites: Is there a shortcut or some quicker method/program/tool to ...
4
votes
4answers
865 views

Gimp grid strange behavior - feature or bug?

When I create a grid in Gimp (a 32x32px grid with 0x0px offset), the distance between the top edge of the image, and the first grid line, is 31 pixels, almost like the grid starts one pixel above the ...
2
votes
1answer
38 views

GIMP: 'move layer' stops working

I'm having intermittent problems with GIMP, where the 'move layer' command suddenly stops working. The mouse pointer changes to the one below: When I make an explicit selection, e.g. CTRL-A on a ...
5
votes
4answers
19k views

How to select more layers with GIMP?

For example in Adobe Photoshop I would just shift+click. How do I do that in GIMP?
2
votes
1answer
511 views

What are useful brush dynamics and tool presets in GIMP 2.8?

In previous versions of GIMP only pressure was recognized by the brush tool. It wasn't much but it was simple. The new GIMP 2.8 introduces an all new brush dynamics system with a ton of customization ...
0
votes
1answer
48 views

Gimp exports blank png image!

I'm trying to use Gimp to export a small line-style icon with a transparent background. It looks good in Gimp (black icon on the checkerboard of transparency), but the image disappears when exported ...
2
votes
2answers
113 views

Creating this 3d map perspective?

I am trying to create a custom image overlay on leaflet.js. For sake of learning something new, I am trying to lay over the co-ordinates on a 3D-looking map. For example (the map inside the red ...