Version 5.0.0 beta 4

system/Image/Gd.php

@@ -165,6 +165,11 @@ class Gd extends Image
 				imagewebp( $this->image, NULL, $quality );
 			break;
 
+			case 'avif':
+				$quality = Settings::i()->image_jpg_quality ?: 85;
+				imageavif( $this->image, null, $quality );
+				break;
+
 		}
 		return ob_get_clean();
 	}