public void write(Image image, String fileName) {
        write(image, Texture2D.class, fileName);
    }
Writes a 2D image from the given image in a KTX file named from the fileName param
Note that the fileName should contain the extension (.ktx sounds like a wise choice)
@param image the image to write
@param fileName the name of the file to write
jme3-core/src/plugins/java/com/jme3/texture/plugins/ktx/KTXWriter.java