Just my current setup.
Wallpaper: Misty Mountain (/usr/share/backgrounds/ubuntu-mate-photos/matteo-botto-16023.jpg)
Icon theme: Papirus
GTK & Kvantum theme (not visible on the screenshot): Materia
/usr/share/mate-panel/layouts/mylayout.layout
[Toplevel top]
orientation=bottom
expand=true
size=40
[Object briskmenu]
locked=true
position=0
panel-right-stick=false
toplevel-id=top
applet-iid=BriskMenuFactory::BriskMenu
object-type=applet
[Object dockapplet]
locked=true
position=10
panel-right-stick=false
toplevel-id=top
applet-iid=DockAppletFactory::DockApplet
object-type=applet
[Object indicatorappletcomplete]
locked=true
position=225
panel-right-stick=true
toplevel-id=top
applet-iid=IndicatorAppletCompleteFactory::IndicatorAppletComplete
object-type=applet
[Object clockapplet]
locked=true
position=113
panel-right-stick=true
toplevel-id=top
applet-iid=ClockAppletFactory::ClockApplet
object-type=applet
[Object showdesktopapplet]
locked=true
position=32
panel-right-stick=true
toplevel-id=top
applet-iid=WnckletFactory::ShowDesktopApplet
object-type=applet
[Object separator]
locked=true
position=42
panel-right-stick=true
toplevel-id=top
object-type=separator
/usr/share/mate-panel/layouts/mylayout.panel
[general]
default-layout='Single-panel-2-tweak'
object-id-list=['briskmenu', 'dockapplet', 'indicatorappletcomplete', 'clockapplet', 'object-0', 'object-1']
toplevel-id-list=['top']
[toplevels/top]
y=728
y-bottom=0
orientation='bottom'
auto-hide=false
enable-buttons=false
expand=true
size=40
enable-arrows=false
[toplevels/top/background]
color='rgba(0,0,0,0.6)'
type='color'
[objects/indicatorappletcomplete]
applet-iid='IndicatorAppletCompleteFactory::IndicatorAppletComplete'
locked=true
toplevel-id='top'
position=225
object-type='applet'
panel-right-stick=true
[objects/clockapplet]
applet-iid='ClockAppletFactory::ClockApplet'
locked=true
toplevel-id='top'
position=113
object-type='applet'
panel-right-stick=true
[objects/clockapplet/prefs]
format='12-hour'
custom-format=''
[objects/dockapplet]
applet-iid='DockAppletFactory::DockApplet'
locked=true
toplevel-id='top'
position=10
object-type='applet'
panel-right-stick=false
[objects/dockapplet/prefs]
indicator-type=8
app-spacing=4
apps-from-all-workspaces=true
first-run=false
fallback-bar-col=['128', '128', '128']
pinned-apps-on-all-workspaces=true
win-from-cur-workspace-only=false
pinned-apps=['google-chrome.desktop', 'caja.desktop', 'matecc.desktop']
change-panel-color-dock-only=false
use-win-list=true
change-panel-color=false
click-restore-last-active=true
multi-ind=true
panel-act-list=true
dock-fixed-size=-1
bg-type=1
popup-delay=1000
attention-type=1
saved-configs=@as []
[objects/briskmenu]
applet-iid='BriskMenuFactory::BriskMenu'
locked=true
toplevel-id='top'
position=0
object-type='applet'
panel-right-stick=false
[objects/object-0]
applet-iid='WnckletFactory::ShowDesktopApplet'
locked=true
toplevel-id='top'
position=32
object-type='applet'
panel-right-stick=true
[objects/object-1]
locked=true
toplevel-id='top'
position=42
object-type='separator'
panel-right-stick=true