shadow.py and refract.py missing in trail 2.53

[tobin]

Much of what you may be trying to achieve might be best done using "render to texture" features within 3DMax. There, you can perform fancy (otherwise non-realtime) lighting and render the results to a light map which can then be used in Vizard to modulate your scene. I don't have a demo I can easily provide you at the moment but the duck court room is an example of render to texture--all the lighting effect there are generated in 3DMax and baked onto the wall textures. Lights maps are slighly different but same idea.