diff --git a/background-final.html b/background-final.html
index 3f49f59..61d2ca4 100644
--- a/background-final.html
+++ b/background-final.html
@@ -13,6 +13,10 @@
* below. To add a new theme, drop a new *.css file in the same
* directory and add an entry to window.THEMES.
*
+ * renderer - Background renderer: 'vanta' (default, GPU 3D volumetric
+ * clouds, heavy) or 'clouds2d' (lightweight 2D WebGL shader,
+ * very low GPU usage, similar visual style).
+ *
* units - Measurement units for the weather widget.
* 'metric' (°C, km/h) or 'imperial' (°F, mph)
*
@@ -79,6 +83,7 @@ window.CONFIG = {
debug: 0,
theme: 'ash',
units: 'metric',
+ renderer: 'clouds2d', // 'vanta' or 'clouds2d'
language: 'de',
timeFormat: 'DD. MMMM, YYYY ‒ HH:mm:SS',
location: {
@@ -1081,10 +1086,193 @@ else window.SunCalc = SunCalc;
+
+