<World>
   <Camera eye="0, 0, 100" look_at="0,0,0" fov="70" />
   <ShaderGroup name="compare">
     param string str "non-default" [[int lockgeom=1]];
     shader test_compare layer1;
   </ShaderGroup>
   <Quad corner="-100,-100,0" edge_x="200,0,0" edge_y="0,200,0" />
</World>
