Compton is now picom. Migrated all compton references to picom including

config files and folders.  Took clean picom.conf and merging in my modifications.

i3/config

@@ -70,7 +70,8 @@ exec --no-startup-id xautolock -time 10 -locker blurlock
 exec --no-startup-id xfce4-power-manager
 exec --no-startup-id "pkill -9 redshift; redshift -P -t 5000:4000"
 exec --no-startup-id polychromatic-tray-applet
-exec_always --no-startup-id pkill compton; sleep 1; compton -b
+set $picom_start "pkill picom; sleep 1; picom -b"
+exec_always --no-startup-id $picom_start
 exec_always --no-startup-id ff-theme-util
 exec_always --no-startup-id fix_xcursor
 exec_always --no-startup-id optimus-manager-qt
@@ -194,16 +195,16 @@ bindsym $mod+space focus mode_toggle
 # toggle sticky
 bindsym $mod+Ctrl+s sticky toggle;exec notify-send 'sticky windows toggled'
 
-# window transparency adjustment (and alias to restart compton)
+# window transparency adjustment (and alias to restart picom)
 bindsym $mod+$mod_next+z exec transset-df -a --min 0.20 --dec 0.20
 bindsym $mod+$mod_next+Shift+z exec transset-df -a --min 0.1 --dec 0.1
 bindsym $mod+$mod_next+Ctrl+z exec "WINDOWS=$(xdotool search --all --onlyvisible --desktop $(xprop -notype -root _NET_CURRENT_DESKTOP | cut -c 24-) \\"\\" 2>/dev/null); for window in $WINDOWS; do xdotool windowactivate $window; transset-df -a --min 0.20 --dec 0.20; done"
 bindsym $mod+$mod_next+x exec transset-df -a --inc 0.20 --max 0.99
 bindsym $mod+$mod_next+Shift+x exec transset-df -a --inc 0.1 --max 0.99
 bindsym $mod+$mod_next+Ctrl+x exec "WINDOWS=$(xdotool search --all --onlyvisible --desktop $(xprop -notype -root _NET_CURRENT_DESKTOP | cut -c 24-) \\"\\" 2>/dev/null); for window in $WINDOWS; do xdotool windowactivate $window; transset-df -a --inc 0.20 --max 0.99; done"
-bindsym $mod+$mod_next+c exec --no-startup-id "pkill compton; compton -b"
+bindsym $mod+$mod_next+c exec --no-startup-id $picom_start
 
-# window dimming enable or disable (uses xdotool and xprop to set a anti-dim flag, which compton recognises in focus-exclude array) 
+# window dimming enable or disable (uses xdotool and xprop to set a anti-dim flag, which picom recognises in focus-exclude array) 
 bindsym $mod+$mod_next+a exec xprop -id $(xdotool getactivewindow) -f ANTIDIM_FLAG 8c -set ANTIDIM_FLAG 1; exec notify-send 'anti-dim set on window'
 bindsym $mod+$mod_next+d exec xprop -id $(xdotool getactivewindow) -remove ANTIDIM_FLAG; exec notify-send 'dim set on window'
 
@@ -302,7 +303,6 @@ for_window [title="alsamixer"] floating enable border pixel 1
 
 # Application shortcuts
 bindsym $mod+Return exec i3-sensible-terminal
-bindsym $mod+Ctrl+t exec --no-startup-id compton -b
 bindsym Print exec --no-startup-id i3-scrot
 bindsym $mod+Ctrl+x --release exec --no-startup-id xkill
 

picom/picom.conf

+# Thank you code_nomad: http://9m.no/ꪯ鵞
+# and Arch Wiki contributors: https://wiki.archlinux.org/index.php/Compton
+
+#################################
+#
+# Backend
+#
+#################################
+
+# Backend to use: "xrender" or "glx".
+# GLX backend is typically much faster but depends on a sane driver.
+backend = "glx";
+
+#################################
+#
+# GLX backend
+#
+#################################
+
+glx-no-stencil = true;
+
+# GLX backend: Copy unmodified regions from front buffer instead of redrawing them all.
+# My tests with nvidia-drivers show a 10% decrease in performance when the whole screen is modified,
+# but a 20% increase when only 1/4 is.
+# My tests on nouveau show terrible slowdown.
+glx-copy-from-front = false;
+
+# GLX backend: Use MESA_copy_sub_buffer to do partial screen update.
+# My tests on nouveau shows a 200% performance boost when only 1/4 of the screen is updated.
+# May break VSync and is not available on some drivers.
+# Overrides --glx-copy-from-front.
+# glx-use-copysubbuffermesa = true;
+
+# GLX backend: Avoid rebinding pixmap on window damage.
+# Probably could improve performance on rapid window content changes, but is known to break things on some drivers (LLVMpipe).
+# Recommended if it works.
+# glx-no-rebind-pixmap = true;
+
+# GLX backend: GLX buffer swap method we assume.
+# Could be undefined (0), copy (1), exchange (2), 3-6, or buffer-age (-1).
+# undefined is the slowest and the safest, and the default value.
+# copy is fastest, but may fail on some drivers,
+# 2-6 are gradually slower but safer (6 is still faster than 0).
+# Usually, double buffer means 2, triple buffer means 3.
+# buffer-age means auto-detect using GLX_EXT_buffer_age, supported by some drivers.
+# Useless with --glx-use-copysubbuffermesa.
+# Partially breaks --resize-damage.
+# Defaults to undefined.
+#glx-swap-method = "undefined";
+
+#################################
+#
+# Shadows
+#
+#################################
+
+# Enabled client-side shadows on windows.
+shadow = false
+# The blur radius for shadows. (default 12)
+shadow-radius = 5;
+# The left offset for shadows. (default -15)
+shadow-offset-x = -5;
+# The top offset for shadows. (default -15)
+shadow-offset-y = -5;
+# The translucency for shadows. (default .75)
+shadow-opacity = 0.5;
+
+# Set if you want different colour shadows
+# shadow-red = 0.0;
+# shadow-green = 0.0;
+# shadow-blue = 0.0;
+
+# The shadow exclude options are helpful if you have shadows enabled. Due to the way picom 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.
+shadow-exclude = [
+    "! name~=''",
+    "name = 'Notification'",
+    "name = 'Plank'",
+    "name = 'Docky'",
+    "name = 'Kupfer'",
+    "name = 'xfce4-notifyd'",
+    "name = 'cpt_frame_window'",
+    "name *= 'VLC'",
+    "name *= 'compton'",
+    "name *= 'picom'",
+    "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'",
+    # disables shadows for hidden windows
+    "_GTK_FRAME_EXTENTS@:c",
+    "_NET_WM_STATE@:32a *= '_NET_WM_STATE_HIDDEN'",
+    # disables shadows on sticky windows:
+    "_NET_WM_STATE@:32a *= '_NET_WM_STATE_STICKY'",
+    # disables shadows on i3 frames
+    "class_g ?= 'i3-frame'",
+    # workaround for conky until it provides window properties:
+    "override_redirect = 1 && !WM_CLASS@:s"
+];
+# Avoid drawing shadow on all shaped windows (see also: --detect-rounded-corners)
+shadow-ignore-shaped = false;
+
+#################################
+#
+# Opacity
+#
+#################################
+
+inactive-opacity = 1;
+active-opacity = 1;
+frame-opacity = 1;
+inactive-opacity-override = false;
+opacity-rule = [
+    "80:class_g = 'copyq'",
+    "90:name = 'alttab'",
+    # no opacity on sticky windows
+    "99:_NET_WM_STATE@:32a *= '_NET_WM_STATE_STICKY'"
+];
+
+# Dim inactive windows. (0.0 - 1.0)
+inactive-dim = 0.2;
+
+# Do not let dimness adjust based on window opacity.
+# inactive-dim-fixed = true;
+# Blur background of transparent windows. Bad performance with X Render backend. GLX backend is preferred.
+# blur-background = true;
+# Blur background of opaque windows with transparent frames as well.
+# blur-background-frame = true;
+# Do not let blur radius adjust based on window opacity.
+blur-background-fixed = false;
+blur-background-exclude = [
+    "window_type = 'dock'",
+    "window_type = 'desktop'"
+];
+
+#################################
+#
+# Fading
+#
+#################################
+
+# Fade windows during opacity changes.
+fading = true;
+# The time between steps in a fade in milliseconds. (default 10).
+fade-delta = 4;
+# Opacity change between steps while fading in. (default 0.028).
+fade-in-step = 0.03;
+# Opacity change between steps while fading out. (default 0.03).
+fade-out-step = 0.03;
+# Fade windows in/out when opening/closing
+# no-fading-openclose = true;
+
+# Specify a list of conditions of windows that should not be faded.
+fade-exclude = [ ];
+
+#################################
+#
+# Other
+#
+#################################
+
+# Try to detect WM windows and mark them as active.
+mark-wmwin-focused = true;
+# Mark all non-WM but override-redirect windows active (e.g. menus).
+mark-ovredir-focused = true;
+# Use EWMH _NET_WM_ACTIVE_WINDOW to determine which window is focused instead of using FocusIn/Out events.
+# Usually more reliable but depends on a EWMH-compliant WM.
+use-ewmh-active-win = true;
+# Detect rounded corners and treat them as rectangular when --shadow-ignore-shaped is on.
+detect-rounded-corners = true;
+
+# Detect _NET_WM_OPACITY on client windows, useful for window managers not passing _NET_WM_OPACITY of client windows to frame windows.
+# This prevents opacity being ignored for some apps.
+# For example without this enabled my xfce4-notifyd is 100% opacity no matter what.
+detect-client-opacity = true;
+
+# Specify refresh rate of the screen.
+# If not specified or 0, picom will try detecting this with X RandR extension.
+refresh-rate = 0;
+
+# Vertical synchronization: match the refresh rate of the monitor
+vsync = true;
+
+# Enable DBE painting mode, intended to use with VSync to (hopefully) eliminate tearing.
+# Reported to have no effect, though.
+dbe = false;
+
+# Limit picom to repaint at most once every 1 / refresh_rate second to boost performance.
+# This should not be used with --vsync drm/opengl/opengl-oml as they essentially does --sw-opti's job already,
+# unless you wish to specify a lower refresh rate than the actual value.
+#sw-opti = true;
+
+# Unredirect all windows if a full-screen opaque window is detected, to maximize performance for full-screen windows, like games.
+# Known to cause flickering when redirecting/unredirecting windows.
+unredir-if-possible = false;
+
+# Specify a list of conditions of windows that should always be considered focused.
+# Exclude treats as always focused (doesn't dim)
+focus-exclude = [
+  "ANTIDIM_FLAG@:8c",
+  "_NET_WM_STATE@:32a *= '_NET_WM_STATE_STICKY'"
+];
+
+# Use WM_TRANSIENT_FOR to group windows, and consider windows in the same group focused at the same time.
+detect-transient = true;
+# Use WM_CLIENT_LEADER to group windows, and consider windows in the same group focused at the same time.
+# WM_TRANSIENT_FOR has higher priority if --detect-transient is enabled, too.
+detect-client-leader = true;
+
+#################################
+#
+# Window type settings
+#
+#################################
+
+wintypes:
+{
+    tooltip =
+    {
+        # fade: Fade the particular type of windows.
+        fade = true;
+        # shadow: Give those windows shadow
+        shadow = false;
+        # opacity: Default opacity for the type of windows.
+        opacity = 0.85;
+        # focus: Whether to always consider windows of this type focused.
+        focus = true;
+    };
+};
+
+######################
+#
+# XSync
+# See: https://github.com/yshui/picom/commit/b18d46bcbdc35a3b5620d817dd46fbc76485c20d
+#
+######################
+
+# Use X Sync fence to sync clients' draw calls. Needed on nvidia-drivers with GLX backend for some users.
+xrender-sync-fence = true;