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1

This PNG file is in indexed color mode. This means that it only contains a limited amount of (different) colors, in its so-called color map. You can't use any colors other than those in GIMP as long as the image is in this mode. In this case, it is actually 77 times the same color, #CCCECC in HTML notation. In order to remove this restriction, change the ...


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If you want to make existing color (that is, pixels with a given value of transparency in your image) more transparent, you can use the Eraser tool in GIMP. Make sure that your image and the layers you're using it on have an alpha channel, otherwise the eraser will just erase to the current background color.


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I'm pretty sure this was the following bug: https://bugzilla.gnome.org/show_bug.cgi?id=588512 Fixed recently - to be precise, Wed May 21 20:43:05 2014 +0200. The fix is available in releases 2.8.12 and newer.


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This bug appears to be active in 2.8.10. The problem seems to be an off-by-one error in the first row, and column of each grid. The solution seems to be to offset your grid by a negative amount one less than your grid-size. So, for a grid of 32x32, offset by -31x and -31y. This pushes the broken row and column out of your workspace.


2

Looks like your move tool is in 'Move selection' mode. Check the Move setting in the tool options (this image is from the docs and shows Move layer mode): The Alt key toggles to the 'Move selection' mode (Ctrl does the same for 'Move path'), and is supposed to switch back to 'Move layer' once you let go of the key. If you manage to steal the input focus ...


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You can use the color picker button in GIMP's foreground and background color dialog or dockable for that. It works like this: you click the button you click anywhere on your screen the color is set You will encounter one issue, however: On 32 bit Windows platforms, the only color you'll be able to pick this way is black - this is a problem in the ...


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This is not possible in GIMP, up to and including 2.8.x. If and when it is available (in the then-current development branch at least), then the corresponding enhancement request at https://bugzilla.gnome.org/show_bug.cgi?id=730216 will be marked resolved fixed.


3

Dynamics presets as standalone are seldom useful. They do make a lot of sense tho when used in full tool presets, so I recommend starting there. There must be something that makes sense for your uses. There are also several preset packs around. You can try them out and learn how they do what they do. :) ...


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This looks like a bug in GIMP (or maybe libpng) - the only layer in your image doesn't cover the whole canvas. But the PNG file format can actually handle such offsets, so it should still show up in the exported file in this case. Please file a bug for this in GNOME Bugzilla and attach the files you had uploaded previously: ...


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Have you tried switching the mode of your overlay layer? I've been playing with this feature in GIMP lately with amazing results. For example, I took a print of roses and put it over a 3D rendering of a Victorian dress in grey (created in DAZ3D) and it appears to map to the curves and maintains the shading. You may have to do two layers, one for the oceans ...


2

Blender might be overkill, but it certainly can do this. Import an SVG map. There is an addon bundled with blender which allows you to do this. If SVG not listed in File > Import, you must enable it in File > User Preferences > Addons: Then click File > Import > SVG and select your map (I used this one) Unfortunately the importer isn't perfect, and ...


1

If you have GIMP-GAP (http://www.gimp.org/tutorials/Using_GAP/) installed then you can use it to load your files. 1) Make sure that all of your frames are named sequentially[*] using a pattern such as "filename_0001.eps", "filename_0002.eps", "filename_0003.eps", ... 2) Open the first file using "Edit->Open" -- this will present you with the postscript ...


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Just guessing, but there is one thing we sometimes see on the #gimp irc channel that matches the symptom: If your PNG file is in indexed color mode, it will only display with 256 colors in GIMP. Shades of one color are individual colors in this context. Which ones are available depends on the image's palette aka colormap, that's the dialog where you'd see ...


4

The issue we have in your example picture is that pasting is normally done in the active layer. This active layer is marked with dotted yellow lines in your example. Pastes outside of this layer will not be possible. The example below shows how a paste partly inside, partly outside of the active layer will render: To overcome this we can either create a ...


3

In GIMP 2.8 you can simply lock the transparency of a layer while editing. Then, no operations will affect the existing transparency levels of a layer while you edit with any tools or filters. Just click on the checkbox for that on the Layers Dialog (ctrl + L)


1

A rather quick way to colorize a monochrome object with variable transparency on a transparent background is using the bucket fill tool with fill FG color fill and fill mode Color. This will replace the object's color by the chosen foreground color leaving transparency levels untouched: Source: "Color" bucket fill green:


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After a few minutes more of poking around in Gimp I finally noticed that the selection tool had an anti-aliasing option, that was turned on. If this is not selected you get hard edged fills.


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GIMP has a tool that selects by color. The icon looks like three squares stacked that are blue,red and green and to the left is a yellow pentagon pointing in between blue and red.


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If you want a precise size use your brush with Pencil Tool instead Paintbrush Tool.


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While @Takkat's answer is correct and should work for you, I have one step method which I prefer: Use the Curves tool (Colors->Curves), select the Alpha Channel, and simply drag the curve so that it is an horizontal line at the top. All Alpha information is mapped to "1" (full opacity). The effect may, of course, be achieved by the levels tool as well, ...


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After all, the image needs to be cleaned. In GIMP you can use the Select By Color tool with a threshold of e.g. 30 and select the background: Delete the selection with del key and un-select with Shift-Ctrl-A: Scale the image to the desired size using a proper interpolation algorithm: Note that now the drawing is very little: In order to obtain a ...


2

For my answer I need a little preamble. In GIMP as well in other editors the images can have a specific channel named Alpha channel, so named from a process called alpha compositing, used to create the appearance of partial or full transparency. You can find here a simple diagram which illustrates this concept. Some image formats (e.g. PNG) are able to ...


3

With the eraser tool we will replace pixel color information with alpha transparency in case there was an alpha channel (or background color if no alpha layer was defined). Removing this alpha channel will replace all alpha by the background color. This will sometimes lead to unwanted artifacts in semi-transparent areas. To overcome this we need to first ...



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