diff --git a/themes/assets/assets.less b/themes/assets/assets.less
index b84f9804e..6515ef417 100644
--- a/themes/assets/assets.less
+++ b/themes/assets/assets.less
@@ -2,14 +2,14 @@
 @footerAccentImage        : url('/assets/PHB_footerAccent.png');
 @frameBorderImage         : url('/assets/frameBorder.png');
 @backgroundImage          : url('/assets/parchmentBackground.jpg');
-@backgroundImageAlt       : url('/assets/fluffy_background.png');
-@backgroundImageAltDark       : url('/assets/fluffy_background_dark.png');
+@backgroundImageAlt       : url('/assets/fluffy_background.webp');
+@backgroundImageAltDark   : url('/assets/fluffy_background_dark.webp');
 @redTriangleImage         : url('/assets/redTriangle.png');
 @monsterBorderImageLegacy : url('/assets/monsterBorderLegacy.png');
 @noteBorderImage          : url('/assets/noteBorder.png');
 @descriptiveBoxImage      : url('/assets/descriptiveBorder.png');
 @monsterBlockBackground   : url('/assets/parchmentBackgroundGrayscale.jpg');
-@monsterBlockOverlay   : url('/assets/parchmentBackgroundOverlayed.jpg');
+@monsterBlockOverlay      : url('/assets/parchmentBackgroundOverlayed.jpg');
 @monsterBorderImage       : url('/assets/monsterBorderFancy.png');
 @codeBorderImage          : url('/assets/codeBorder.png');
 @classTableDecoration     : url('/assets/classTableDecoration.png');
diff --git a/themes/assets/fluffy_background.png b/themes/assets/fluffy_background.png
deleted file mode 100644
index 02d0489e6..000000000
Binary files a/themes/assets/fluffy_background.png and /dev/null differ
diff --git a/themes/assets/fluffy_background.webp b/themes/assets/fluffy_background.webp
new file mode 100644
index 000000000..90292d55b
Binary files /dev/null and b/themes/assets/fluffy_background.webp differ
diff --git a/themes/assets/fluffy_background_dark.png b/themes/assets/fluffy_background_dark.png
deleted file mode 100644
index 21f6af715..000000000
Binary files a/themes/assets/fluffy_background_dark.png and /dev/null differ
diff --git a/themes/assets/fluffy_background_dark.webp b/themes/assets/fluffy_background_dark.webp
new file mode 100644
index 000000000..16aee37d4
Binary files /dev/null and b/themes/assets/fluffy_background_dark.webp differ