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  1. #11

    Default Raster Images: Truevision Advanced Raster Graphics Adapter (TGA)

    Around the same time that TIFF was being developed, Truevision was developing another similar format for digital video applications. Truevision was eventually purchased by Avid Technology, which continues to support the format in its video editing software. Unlike TIFF, TGA is unencumbered by copyright or patents, making it a somewhat safer format.

    Targa is technically inferior to tiff because it lacks support for layering and can use only one type of compression (RLE). Its advantages, though, are inherent in that simplicity; every application and system that supports TGA will render it the same way, making it very popular still in video production pipelines. It supports a standardized alpha channel that most applications will interpret properly as a transparency channel. In addition to digital video, Targa is also popular in video gaming, where it is frequently used for texture maps.

    TGA's maximum color depth is 32 bits per pixel: three 8-bit channels for RGB and another 8-bit alpha. Use TGA when you need lossless compression, transparency, and wide compatibility.
    Last edited by Midgardsormr; 02-07-2013 at 03:02 PM.
    Bryan Ray, visual effects artist
    http://www.bryanray.name

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