reno/extra/picom.conf

backend = "glx";
vsync = true;
# Shadow
blur-method = "dual_kawase";
blur-strength = 5;
blur-size = 7;
shadow = true;			# Enabled client-side shadows on windows.
shadow-radius = 12;		# The blur radius for shadows. (default 12)
shadow-offset-x = -7;		# The left offset for shadows. (default -15)
shadow-offset-y = -7;		# The top offset for shadows. (default -15)
shadow-opacity = 0.25;
shadow-exclude = [
 "! name~=''",
 "n:e:Notification",
 "n:e:Plank",
 "n:e:Docky",
 "g:e:Synapse",
 "g:e:Kupfer",
 "g:e:Conky",
 "n:w:*Firefox*",
 "n:w:*Chrome*",
 "n:w:*Chromium*",
 "class_g ?= 'Notify-osd'",
 "class_g ?= 'Cairo-dock'",
 "class_g ?= 'Xfce4-notifyd'",
 "class_g ?= 'Xfce4-power-manager'",
 #"class_g ?= 'awesome'",
 #"class_g ?= 'Awesome'"
];

# The shadow exclude options are helpful if you have shadows enabled. Due to the way compton draws its shadows, certain applications will have visual glitches 
# (most applications are fine, only apps that do weird things with xshapes or argb are affected). 
# This list includes all the affected apps I found in my testing. The "! name~=''" part excludes shadows on any "Unknown" windows, this prevents a visual glitch with the XFWM alt tab switcher.

# Fading
fading = true;
# Fade windows during opacity changes.
fade-delta = 4; # The time between steps in a fade in milliseconds. (default 10).
fade-in-step = 0.03; # Opacity change between steps while fading in. (default 0.028).
fade-out-step = 0.03; # Opacity change between steps while fading out. (default 0.03).
#no-fading-openclose = true; # Fade windows in/out when opening/closing

detect-client-opacity = true; # This prevents opacity being ignored for some apps. For example without this enabled my xfce4-notifyd is 100% opacity no matter what.

# Window type settings
wintypes: {
  tooltip = { fade = true; shadow = false; };
#  dock = { shadow = false; fade = false; };
#  dnd = { shadow = false; fade = false; };
};

# Disable fade for awesomewm components (causes lag with custom menus)
#fade-exclude = [
#    "class_g ?= 'awesome'",
#    "class_g ?= 'Awesome'"
#];