+ <number id="complexity" type="slider" arg="-complexity %"
+ _label="Complexity" _low-label="Low" _high-label="High"
+ low="1" high="3" default="2"/>
+
+ <number id="spherism" type="slider" arg="-spherism %"
+ _label="Sphere strength" _low-label="None" _high-label="Strong"
+ low="0" high="1000" default="75"/>