Truevision TGA, or also known as TARGA, is a raster graphics file format created by Truevision.
When checked, the image will be compressed using ”Run-Length Encoding”, otherwise it will be uncompressed. Using RLE should in general produce smaller files.
This setting allows you to choose what to use as origin of the image. This will only be used internally to store the image. It will not have any visual difference. Choices are:
The image data is stored starting from the bottom left corner and then going upward.
The image data is stored starting from the top left corner and from there going down.