DEF GROUP_RENDER GroupRenderToTexture {
          children
  
          # the scene to render 
          DEF SCENE Inline { url "wrl/shader-camera.wrl" }
  
          # scene is rendered to this texture 
          outputTexture DEF OUTPUT_TEXTURE CompositeTexture3D 
          { 
                  pixelWidth 512
                  pixelHeight 512
          
          }