Shockwave Export and Lighting

I tried exporting the model of Apollo's chariot into the shockwave 3D format. However, when I viewed the model in Director, it only could be viewed properly from certain angles. The bottom and one side of the model appeared to be there but in darkness so it could not be seen. I added lights around all sides of the model and exported it again. The model can now be seen properly from all angles. I am not sure if this matters in DART's 3D world. It is possible that 3D world has its own lights. I will need to test this. In the future, if the model is meant to be manipulated by the user like in the case of the moonshot rather than a preset animation with the only possible angles being preset, we may have to make sure that models are properly lit so they will not be in darkness at some angles.