SGI
Gimp can both read and write to the SGI file format. This format by Silicon Graphics Inc. supports black and white (usually with the extension .bw), color (.rgb) and color images with an alpha channel (.rgba). You may also find SGI files in any of the above formats with the extension .sgi. SGI images are normally only found on SGI workstations. #### Compression Type When saving an SGI image, Gimp will prompt you to specify a compressionn type. RLE (Run Length Encoded) compression is recommanded since it is a lossless format. The Aggressive RLE option may produce a smaller filesize, but SGI applications may not open the image correctly. ### Additional Information Format Specification - Advanced information describing the low level SGI format. Index