Looking at the example lunar_vehicle_tris.dae I see a lot of nodes without anything nested in them. Do they actually contribute to the visual scene or are they merely there to confuse me?
<node id="_left_hand" name="left_hand">
<translate sid="translate">2.42846 -1.58929 0.029951</translate>
<rotate sid="rotateZ">0 0 1 -12.4288</rotate>
<rotate sid="rotateY">0 1 0 2.35336</rotate>
<rotate sid="rotateX">1 0 0 2.77433</rotate>
<scale sid="scale">0.003051 0.003051 0.003051</scale>
</node>