Am 21.05.2017 um 18:28 schrieb Kenneth:
> Alain <kua### [at] videotronca> wrote:
> 
>>
>> You forgot the cases where there is shadows involved.
> 
> Yeah, the media's self-shadowing behavior is another aspect of this. Regarding
> intervals, are those *partial* shadows in the category of 'illuminated
> intervals' or not? It's a mystery to me!

I've never really looked at the intervals mechanism in detail (I just
know that they exist), but I can't imagine it being able to detect such
cases. I wouldn't even know how it could possibly detect the shadows of
objects. Such effects can only be detected on a sub-interval basis.

So from what I know, the intervals mechanism can only identify the
boundaries of spotlights, and/or possibly overlapping media containers
(though I guess the latter is handled at a higher level).

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