I think it should be fairly simple to implement and should work this way:
it would control the trace level at which the object becomes visible.
Eg: visibility_level 0: this should do nothing.
visibility_level 1: the object wouldn't be directly visible but it would be
reflected and refracted and it would be taken into account for radiosity
calculations.
visibility_level n: the object wouldn't be directly visible but it would
become visible starting from the n_th level of recursion.

Of course if n> max_trace_level-1 the object wouldn't be visible at all.

I think this would be a much more powerful flag than no_image.

Any takers?
I saw this somewhere, but can't remember where.


--
Jonathan.

Home: http://digilander.iol.it/jrgpov

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