My picom config file

compton.conf

# https://gist.github.com/gaurav712/42549678b778db12fda5764f7c0757ad

backend = "glx";
# backend = "xr_glx_hybrid"; # Better performance on my 6200U ThinkPad T470s.
glx-no-stencil = true;
glx-no-rebind-pixmap = true;

glx-copy-from-front = false;
glx-use-copysubbuffermesa = true;
vsync = false;
unredir-if-possible = true; # true for game pefromance

detect-rounded-corners = true;
detect-client-opacity = true;

detect-transient = true;
detect-client-leader = true;

shadow = true;
shadow-radius = 30;
shadow-offset-x = -30;
shadow-offset-y = -30;
shadow-opacity = 0.5;
inactive-opacity = 1;
inactive-dim = 0;

fading = true
fade-in-step = 0.03;
fade-out-step = 0.03;
fade-delta = 10

shadow-exclude = [
    "! name~=''",
    "name = 'Notification'",
    "name = 'Plank'",
    "name = 'Docky'",
    "name = 'Kupfer'",
    "name = 'xfce4-notifyd'",
    "name *= 'VLC'",
    "name *= 'compton'",
    "name *= 'Chromium'",
    "name *= 'Chrome'",
    "class_g = 'Firefox' && argb",
    "class_g = 'Conky'",
    "class_g = 'Kupfer'",
    "class_g = 'Synapse'",
    "class_g ?= 'Notify-osd'",
    "class_g ?= 'Cairo-dock'",
    "class_g ?= 'Xfce4-notifyd'",
    "class_g ?= 'Xfce4-power-manager'",
    "_NET_WM_STATE@:32a *= '_NET_WM_STATE_HIDDEN'",
    "class_g = 'yakuake'",
    "class_g = 'lattedock'",
    "_GTK_FRAME_EXTENTS@:c",
    "QTILE_INTERNAL@:c",
    "name = 'cpt_frame_xcb_window'",
    "class_g ?= 'zoom'",
    "_NET_WM_STATE@:32a *= '_NET_WM_STATE_HIDDEN'",
    "_NET_WM_OPAQUE_REGION@:c",
    "class_g = 'Thunderbird' && argb",
    "window_type = 'dock'",
    "x = 0 && y = 0 && override_redirect = true",
    "x = 1920 && y = 0 && override_redirect = true",
];


wintypes:
{
	tooltip 		= { fade = true; shadow = false; pacity = 0.9; focus = true; full-shadow = false; };
	dropdown_menu 	= { shadow = false; };
	popup_menu 		= { shadow = false; };
	utility 		= { shadow = false; };
};

fading = false;
fade-delta = 4;
fade-in-step = 0.2;
fade-out-step = 0.04;
fade-exclude = [ ];

# blur-background = false;
# blur-background-frame = false;
# blur-background-fixed = false;

#blur-kern = "3x3box";
blur-method = "dual_kawase";
blur-strength = 3;

opacity-rule = [
  "90:class_g = 'URxvt' && focused",
  "60:class_g = 'URxvt' && !focused",
  "95:class_g = 'URxvt' && !_NET_WM_STATE@:32a",
  "0:_NET_WM_STATE@[0]:32a *= '_NET_WM_STATE_HIDDEN'",
];

blur-background-exclude = [
    "window_type = 'dock'",
    "window_type = 'desktop'",
    "x = 0 && y = 0 && override_redirect = true",
    "x = 0 && y = 0 && override_redirect = true",
    "x = 1920 && y = 0 && override_redirect = true",
#    "_GTK_FRAME_EXTENTS@:c"
];