A good place to start is the Writing a GIMP Plug-In documentation: http://gimp-plug-ins.sourceforge.net/doc/Writing/ Once you get the basic idea how plug-ins work and come up with an algorithm you wish to implement, it helps to take the source code from a simple plug-in, i.e. blur, and replace the algorithm and plug-in information with your own. - David On Thu, 1 Feb 2001, Image Processing wrote: > Hi, I am learning image proceesing nowadays. And I find that GIMP is really a nice place to visit. > > I have several questions. I like to implement some special effects by myself, such as 'Colored Pencil', 'Chalk & Charcoal' in Adobe Photoshop. But I don't know how to do. Could anybody give me some advice about how to do? Thanks a lot! > > Best Regards, > > Bam