scripts: tweak swww options

roles/scripts/templates/launch_wallpaper.j2

@@ -42,7 +42,9 @@ fi
 pkill -9 mpvpaper
 
 for i in ${outputs}; do
-	mpvpaper -f -p -o 'no-audio --loop-file=inf --profile=libmpv' "$i" "$(shuf -z -n 1 -e ${wallpapers})"
+	mpvpaper -f -p \
+		-o 'no-audio --loop-file=inf --profile=libmpv' \
+		"$i" "$(shuf -z -n 1 -e ${wallpapers})"
 done
 {% elif wallpaper_engine == 'swww' %}
 # Re-launch the wallpaper daemon
@@ -50,6 +52,12 @@ swww kill 2>/dev/null
 swww init
 
 for i in ${outputs}; do
-	swww img --transition-type random -o "$i" "$(shuf -z -n 1 -e ${wallpapers})"
+	swww img \
+		--transition-type random \
+		--transition-speed 10 \
+		--transition-step 10 \
+		--filter Lanczos3 \
+		--outputs "$i" \
+		"$(shuf -z -n 1 -e ${wallpapers})"
 done
 {% endif %}