FEATHER /FILE

        [ADVANCED\]FEATHER /FILE Combined HIGHRes LOWres [/REPROJECT]

      Takes  the  data  from files named HIGHres and LOWres and put the combined
    result in file named Combined. The default extension .lmv-sky.

      Without the /FILE option, FEATHER  takes  HIGHres  from  the  SKY  buffer,
    LOWres from the Short Spacing buffer (SHORT, equal to SINGLE if it is a data
    cube, or derived by UV_SHORT if not), and put the result into an image vari-
    able named FEATHERED. The result can be written as any image by WRITE FEATH-
    ERED FileName.

    Note:  Currently,  in all cases, the images reside in memory.  A buffer mode
    for the /FILE option will be added later.