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This simple plugin allows you to change the values of each color channel of each pixel of a layer by using mathematical expressions.
It is able to handle RGB* and Gray* images. Available operators are: +, -, *, /, , and %.
There are many functions available, such as sin, cos, sqrt, abs, min, max.
A few constants are provided (pi, e, j), and a lot of pre-defined variables are usable (w for image's width, h for image's height, x and y for cartesian coordinates in the image, etc.).


btn4ws generates a series of buttons for use on websites. The plugin generates the buttons for 3 different states (active, inactive, pressed) and can apply different effects (supernova, patterns, shadows) onto the buttons. btn4ws can also create valid XHTML, CSS and JavaScript output for using the buttons. btn4ws is a python based plugin for GIMP 2.x (tested with GIMP 2.4.3)

Planet Render

Creates a planet lit on one side, with some kind of atmosphere glow. The size and color of the planet as well as the angle for the light can be set.
An example tutorial can be found here.

- Version 1-2.scm is for GIMP 2.4 and 2.6* and above.
( please note that on 2.6, it is in the "File > Create > Misc" menu )
- Version 1-1.scm is for GIMP 2.2

(10/2010: Updated when I noticed I gave a link to the wrong tutorial. Not that anyone noticed :p)


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