<boolean id="walls" _label="Enable Walls"/>
<boolean id="colour" _label="Enable Colouring" arg-set="-colour"/>
<boolean id="texture" _label="Enable Reflected Image" arg-unset="-no-texture"/>
<boolean id="walls" _label="Enable Walls"/>
<boolean id="colour" _label="Enable Colouring" arg-set="-colour"/>
<boolean id="texture" _label="Enable Reflected Image" arg-unset="-no-texture"/>