Specifies the preferred format for associated texture files. This preference will be used as long as the specified format supports the properties of the texture raster; if not, it will be overridden.
Possible values are:
- Auto (default) – The writer chooses the best representation based on the incoming texture raster.
- PNG
- JPEG
- GIF
- BMP
If the preferred format is ignored, a message is added to the log file. Possible reasons that the preference will be ignored include a lack of raster palette support, alpha channel support, or color depth support in the selected format.