Script-Fu
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Script-Fu is a scripting extension for the GIMP, a bitmap graphics editor. It used to be based on SIOD (Scheme in One Defun), but was switched to TinyScheme as of GIMP 2.4.
A wide variety of useful scripts have been written for this extention, though many of them are incompatible with newer versions of Gimp due to TinyScheme's somewhat stricter syntax.
Some misgivings toward Script-Fu are based on experiences of less-than-complete documentation and cryptic error messages.[citation needed]