public void setBitsPerPixel(int value) {
        putInteger("BitsPerPixel", value);
    }
Set the bits per pixel for the display. Appropriate
values are 16 for RGB565 color format, or 24 for RGB8 color format.

@param value The bits per pixel to set
(Default: 24)
jme3-core/src/main/java/com/jme3/system/AppSettings.java