[JAVA3D] lighting error

[JayT]

hi, anyone have any idea what this means?   javax.media.j3d.IllegalRenderingStateException: Cannot do lighting without specifying normals in geometry object         at javax.media.j3d.RenderQueue.insert(RenderQueue.java:351)         at javax.media.j3d.Traverser.insertRenderObjects(Traverser.java:599)         at javax.media.j3d.Traverser.run(Traverser.java:2111)   thanks, Jay