### ----------- FSL ------------ ####
if [ -n "$FSL_DIR" ]; then
    export FSLDIR=$FSL_DIR
    export FSL_BIN=$FSL_DIR/bin
    if [ ! -d $FSL_BIN ]; then
        if [[ $output == 1 ]]; then
            echo "WARNING: $FSL_BIN does not exist.";
        fi
    fi
    if [ -e $FSL_DIR/etc/fslconf/fsl.sh ]; then
        source $FSL_DIR/etc/fslconf/fsl.sh
    fi
    export FSLOUTPUTTYPE=NIFTI_GZ
    # use local ImageMagick stuff
    if [ -e /usr/bin/display ]; then
        export FSLDISPLAY=/usr/bin/display
    fi
    if [ -e /usr/bin/convert ]; then
        export FSLCONVERT=/usr/bin/convert
    fi
fi
if [ -n "$FSL_BIN" ]; then
    PATH=$FSL_BIN:$PATH