diff --git a/config/kde/theming.nix b/config/kde/theming.nix
index 1a587dc3..bbeef09a 100644
--- a/config/kde/theming.nix
+++ b/config/kde/theming.nix
@@ -1,7 +1,12 @@
-{ ... }:
+{ systemConfig, pkgs, ... }:
 {
   programs.plasma = {
-    workspace.lookAndFeel = "org.kde.breezedark.desktop";
+    workspace = {
+      lookAndFeel = "org.kde.breezedark.desktop";
+      wallpaperSlideShow = {
+        path = if systemConfig.isNSFW then "${pkgs.art-lotte-bgs-nsfw}" else "${pkgs.art-lotte-bgs-sfw}";
+      };
+    };
     hotkeys.commands."launch-konsole" = {
       name = "Launch Konsole";
       key = "Meta+Alt+K";
diff --git a/flake.nix b/flake.nix
index 2d159aac..044b9ef9 100644
--- a/flake.nix
+++ b/flake.nix
@@ -101,6 +101,7 @@
         in
         import nixpkgs {
           inherit system;
+          config.allowUnfree = true;
           overlays =
             [
               (
@@ -110,6 +111,7 @@
                   inputs = inputs';
                 }
               )
+              self.overlays.default
             ]
             ++ (
               if system == "riscv64-linux" then
@@ -218,7 +220,7 @@
         in
         containers // systems;
       hydraJobs = {
-        inherit (self) checks devShells;
+        inherit (self) checks devShells packages;
         nixosConfigurations = nixpkgs.lib.mapAttrs (
           _: v: v.config.system.build.toplevel
         ) self.nixosConfigurations;
@@ -231,8 +233,34 @@
             sops
             ssh-to-age
             nixfmt-rfc-style
+            nix-prefetch
+            nix-prefetch-git
           ];
         };
       formatter.x86_64-linux = (pkgsFor "x86_64-linux").nixfmt-rfc-style;
+      overlays.default = import ./packages;
+      packages = nixpkgs.lib.listToAttrs (
+        map
+          (name: {
+            inherit name;
+            value =
+              let
+                pkgs = pkgsFor name;
+              in
+              {
+                inherit (pkgs)
+                  art-lotte
+                  art-lotte-bgs-nsfw
+                  art-lotte-bgs-sfw
+                  package-updater
+                  ;
+              };
+          })
+          [
+            "x86_64-linux"
+            "riscv64-linux"
+            "aarch64-linux"
+          ]
+      );
     };
 }
diff --git a/machine/rainbow-resort/default.nix b/machine/rainbow-resort/default.nix
index e18c7668..9c437bd4 100644
--- a/machine/rainbow-resort/default.nix
+++ b/machine/rainbow-resort/default.nix
@@ -1,5 +1,6 @@
 {
   nixos-config,
+  lib,
   ...
 }:
 {
@@ -20,5 +21,23 @@
       }
     ];
   };
+  specialisation.sfw = {
+    configuration.imports = [
+      {
+        nix.auto-update.specialisation = "sfw";
+        isNSFW = lib.mkForce false;
+      }
+    ];
+  };
+  specialisation.quiet-sfw = {
+    configuration.imports = [
+      "${nixos-config}/config/graphical/plymouth.nix"
+      {
+        nix.auto-update.specialisation = "quiet-sfw";
+        isNSFW = lib.mkForce false;
+      }
+    ];
+  };
   home-manager.users.darkkirb.imports = [ ./home-manager.nix ];
+  isNSFW = true;
 }
diff --git a/machine/thinkrac/default.nix b/machine/thinkrac/default.nix
index 4f910b87..a4aaa2f1 100644
--- a/machine/thinkrac/default.nix
+++ b/machine/thinkrac/default.nix
@@ -20,4 +20,21 @@
       }
     ];
   };
+  specialisation.nsfw = {
+    configuration.imports = [
+      {
+        nix.auto-update.specialisation = "nsfw";
+        isNSFW = true;
+      }
+    ];
+  };
+  specialisation.quiet-nsfw = {
+    configuration.imports = [
+      "${nixos-config}/config/graphical/plymouth.nix"
+      {
+        nix.auto-update.specialisation = "quiet-nsfw";
+        isNSFW = true;
+      }
+    ];
+  };
 }
diff --git a/modules/default.nix b/modules/default.nix
index 8776cc18..46bc259a 100644
--- a/modules/default.nix
+++ b/modules/default.nix
@@ -2,6 +2,8 @@
   disko,
   home-manager,
   lib,
+  inTester,
+  self,
   ...
 }:
 with lib;
@@ -18,4 +20,15 @@ with lib;
   ];
   options.isGraphical = mkEnableOption "Whether or not this configuration is a graphical install";
   options.isInstaller = mkEnableOption "Whether or not this configuration is an installer and has no access to secrets";
+  options.isNSFW = mkEnableOption "Whether or not this configuration is NSFW";
+
+  config =
+    if !inTester then
+      {
+        nixpkgs.overlays = [
+          self.overlays.default
+        ];
+      }
+    else
+      { };
 }
diff --git a/packages/art/lotte/bgs-nsfw.nix b/packages/art/lotte/bgs-nsfw.nix
new file mode 100644
index 00000000..45dfb3bf
--- /dev/null
+++ b/packages/art/lotte/bgs-nsfw.nix
@@ -0,0 +1,39 @@
+{ art-lotte, stdenvNoCC }:
+stdenvNoCC.mkDerivation {
+  pname = "sfw-bgs";
+  inherit (art-lotte) version;
+  src = art-lotte;
+  dontUnpack = true;
+  dontBuild = true;
+  nsfwBgs = [
+    "2020-07-24-urbankitsune-bna-ych.jxl"
+    "2021-09-15-cloverhare-lotteplush.jxl"
+    "2021-10-29-butterskunk-lotte-scat-buffet.jxl"
+    "2021-11-27-theroguez-lottegassyvore1.jxl"
+    "2021-12-12-baltnwolf-christmas-diaper-messy.jxl"
+    "2021-12-12-baltnwolf-christmas-diaper.jxl"
+    "2022-04-20-cloverhare-mxbatty-maffsie-train-plush.jxl"
+    "2022-04-20-cloverhare-mxbatty-me-train-maffsie-plush.jxl"
+    "2022-05-02-anonfurryartist-giftart.jxl"
+    "2022-06-21-sammythetanuki-lotteplushpride.jxl"
+    "2022-08-12-deathtoaster-funpit-scat.jxl"
+    "2022-08-15-deathtoaster-funpit-mud.jxl"
+    "2022-11-15-wolfsifi-maff-me-leashed.jxl"
+    "2022-12-27-rexyi-scatych.jxl"
+    "2023-03-09-rexyi-voredisposal-ych.jxl"
+    "2023-08-09-coldquarantine-lotte-eating-trash.jxl"
+    "2023-08-10-coldquarantine-lotte-eating-trash-diapers.jxl"
+    "2023-08-20-coldquarantine-lotte-eating-trash-clean.jxl"
+  ];
+  installPhase = ''
+    mkdir $out
+    for f in $nsfwBgs; do
+      ln -svf $src/$f $out/$f
+    done
+  '';
+
+  meta = {
+    description = "NSFW computer backgrounds";
+    inherit (art-lotte.meta) license;
+  };
+}
diff --git a/packages/art/lotte/bgs-sfw.nix b/packages/art/lotte/bgs-sfw.nix
new file mode 100644
index 00000000..ac96531b
--- /dev/null
+++ b/packages/art/lotte/bgs-sfw.nix
@@ -0,0 +1,26 @@
+{ art-lotte, stdenvNoCC }:
+stdenvNoCC.mkDerivation {
+  pname = "sfw-bgs";
+  inherit (art-lotte) version;
+  src = art-lotte;
+  dontUnpack = true;
+  dontBuild = true;
+  sfwBgs = [
+    "2020-07-24-urbankitsune-bna-ych.jxl"
+    "2021-09-15-cloverhare-lotteplush.jxl"
+    "2022-05-02-anonfurryartist-giftart.jxl"
+    "2022-06-21-sammythetanuki-lotteplushpride.jxl"
+    "2022-11-15-wolfsifi-maff-me-leashed.jxl"
+  ];
+  installPhase = ''
+    mkdir $out
+    for f in $sfwBgs; do
+      ln -svf $src/$f $out/$f
+    done
+  '';
+
+  meta = {
+    description = "SFW computer backgrounds";
+    inherit (art-lotte.meta) license;
+  };
+}
diff --git a/packages/art/lotte/default.nix b/packages/art/lotte/default.nix
new file mode 100644
index 00000000..dfb0852e
--- /dev/null
+++ b/packages/art/lotte/default.nix
@@ -0,0 +1,27 @@
+{
+  fetchgit,
+  lib,
+}:
+let
+  srcInfo = lib.importJSON ./source.json;
+  src = fetchgit {
+    inherit (srcInfo)
+      url
+      rev
+      sha256
+      fetchLFS
+      fetchSubmodules
+      deepClone
+      leaveDotGit
+      ;
+  };
+in
+src.overrideAttrs (_: rec {
+  name = "${pname}-${version}";
+  pname = "lotte-art";
+  version = srcInfo.date;
+  meta = {
+    description = "Art I commissioned or made";
+    license = lib.licenses.cc-by-nc-sa-40;
+  };
+})
diff --git a/packages/art/lotte/source.json b/packages/art/lotte/source.json
new file mode 100644
index 00000000..731e053c
--- /dev/null
+++ b/packages/art/lotte/source.json
@@ -0,0 +1,12 @@
+{
+  "url": "https://git.chir.rs/darkkirb/lotte-art",
+  "rev": "9d341d1b44bfbd1305e66ac1f5a07f01413951d0",
+  "date": "2024-09-29T11:09:27+02:00",
+  "path": "/nix/store/s1j9hzifi3f7wc8w39619yvr6n4a0vv7-lotte-art",
+  "sha256": "1rzlvlyjqkbzpyl14v6hgiyb9xkx5rzvhgnbn1gwp0pv5r2lbsnn",
+  "hash": "sha256-1upFRS77gstfsMs+uH8uffa0fHzQbBKov39NLD3d9Oc=",
+  "fetchLFS": true,
+  "fetchSubmodules": false,
+  "deepClone": false,
+  "leaveDotGit": false
+}
diff --git a/packages/art/lotte/updater.nix b/packages/art/lotte/updater.nix
new file mode 100644
index 00000000..3b3182eb
--- /dev/null
+++ b/packages/art/lotte/updater.nix
@@ -0,0 +1,15 @@
+{
+  nix-prefetch-git,
+  curl,
+  jq,
+}:
+''
+  echo "lotte-art: Checking for updates"
+  set CURRENT_COMMIT $(${curl}/bin/curl https://git.chir.rs/api/v1/repos/darkkirb/lotte-art/commits | ${jq}/bin/jq -r '.[0].sha')
+  set KNOWN_COMMIT $(${jq}/bin/jq -r '.rev' packages/art/lotte/source.json)
+  if [ $CURRENT_COMMIT != $KNOWN_COMMIT ];
+    echo "lotte-art: Updating from $KNOWN_COMMIT to $CURRENT_COMMIT"
+    ${nix-prefetch-git}/bin/nix-prefetch-git https://git.chir.rs/darkkirb/lotte-art --fetch-lfs | ${jq}/bin/jq > packages/art/lotte/source.json
+  end
+  echo "lotte-art: Done"
+''
diff --git a/packages/art/updater.nix b/packages/art/updater.nix
new file mode 100644
index 00000000..bf9022bc
--- /dev/null
+++ b/packages/art/updater.nix
@@ -0,0 +1,5 @@
+{
+  lib,
+  callPackage,
+}:
+lib.concatMapStringsSep "\n" (f: callPackage "${f}/updater.nix" { }) [ ./lotte ]
diff --git a/packages/default.nix b/packages/default.nix
new file mode 100644
index 00000000..45d21c67
--- /dev/null
+++ b/packages/default.nix
@@ -0,0 +1,6 @@
+self: super: {
+  art-lotte = self.callPackage ./art/lotte { };
+  art-lotte-bgs-nsfw = self.callPackage ./art/lotte/bgs-nsfw.nix { };
+  art-lotte-bgs-sfw = self.callPackage ./art/lotte/bgs-sfw.nix { };
+  package-updater = self.callPackage ./updater.nix { };
+}
diff --git a/packages/updater.nix b/packages/updater.nix
new file mode 100644
index 00000000..443f2898
--- /dev/null
+++ b/packages/updater.nix
@@ -0,0 +1,13 @@
+{
+  lib,
+  callPackage,
+  writeScriptBin,
+  fish,
+}:
+let
+  script = lib.concatMapStringsSep "\n" (f: callPackage "${f}/updater.nix" { }) [ ./art ];
+in
+writeScriptBin "updater" ''
+  #!${fish}/bin/fish
+  ${script}
+''
diff --git a/programs/desktop/home-manager.nix b/programs/desktop/home-manager.nix
index 3e54f91d..bb7754ef 100644
--- a/programs/desktop/home-manager.nix
+++ b/programs/desktop/home-manager.nix
@@ -15,7 +15,7 @@
     kdePackages.kalk
     kdePackages.kalgebra
     kdePackages.filelight
-    kdePackages.kdegraphics.thumbnailers
+    kdePackages.kdegraphics-thumbnailers
     kdePackages.ffmpegthumbs
     kdePackages.dolphin-plugins
   ];