GIF

GIF stands for Graphics Interchange Format. It is an old image format that was introduced by the CompuServe online service back in the late 1980s. GIF images may contain up to 256 unique colors, support a "background" or transparency mask, and can contain multiple frames for a sort of rudimentary "animation."

The PNG format is considered generally superior to GIF and is preferred wherever possible.

PNG and GIF have one trait in common--neither are supported upload formats for the SecondLife client, which only imports the TGA, BMP, or JPEG image file formats.

Another trait PNG and GIF share is that they are in no way related to LSL.

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file formats