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Am 05.12.2016 um 19:43 schrieb omniverse:
> clipka <ano### [at] anonymous org> wrote:
>> Am 05.12.2016 um 17:14 schrieb omniverse:
>>
>>> A test of 2 spheres, rgb 1 and rgb 0 both with emission -1, caused only a
>>> darkened area for the white (now black) sphere on a white plane.
>>> Black sphere with emission -1 made no change to the white plane below it.
>>>
>>> I take from this that color > 0 is required for emission to do anything. This in
>>> turn makes me think there should be some way to get a black or dark object to
>>> enhance the darkness around it.
>>
>> Try positive emission with a negative pigment ;)
>
> Except that wouldn't allow for a dark, yet positive value, color to likewise
> darken its surroundings.
If that's what you absolutely positively need, there's always the option
to hide your proper object from radiosity using "no_radiosity", and
setting up a menacingly dark radiosity stunt double using "no_image
no_reflection no_shadow".
> Of course, the more I think it over I don't know how much this would be
> deviating from real world. Something I haven't checked into.
Emit darkness? Why, yes - I guess that may need /some/ degree of
deviating from real world :P
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