attached is a minimal example of some lighting troubles I have. The model is exported using chicken from blender. As you can see in the .py, the light is parented to a root node that is parented to render, and the model is also parented to that root node (so, especially, the light is not parented to the model!).
Now, when I let the model rotate around the vertical axis using a hprInterval, the light does not seem to always come from the same direction. Sometimes it lights the upper part of the model, sometimes the lower part. But the model itself is rotating, in my view, the light should not change direction!
What am I doing wrong (see code at: atlas.uni-wuppertal.de/~muenchen/test.tgz)?