anchor.diff:          </Appearance>
         </Shape>
       </Transform>
  -    <Transform translation='2.5 0 -15'>
  +    <Transform translation='2.5 0 0'>
         <Shape>
           <Sphere DEF='DefaultSphere' radius='1'/>
           <Appearance>
  
positive.code:         </Appearance>
        </Shape>
      </Transform>
      <Transform translation='-2.5 0 -15'>
        <Shape>
          <Cone DEF='DefaultCone' bottom='true' bottomRadius='1' height='2' side='true'/>
          <Appearance>
  
negative.code: 
  (render
    <Scene>
      <Transform translation='-5 0 0'>
        <Shape DEF='DefaultShape'>
          <Box DEF='DefaultBox' size='2 2 2'/>
          <Appearance>
  