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On 12/01/2014 5:54 PM, MichaelJF wrote:
> I'm not quite sure what we have here. Negative light is a feature which can be
> used artistically, but then the shadows must be affected too. In your additional
> scenes the shadows of the positive light still seems to be not influenced by the
> negative light.
As Christoph explained. See next two images.
> Most likely we're hunting down a bug here. My opinion is that
> negative light gives more artistic freedom but then it must be implemented
> correctly.
I wonder how it would work with caustics and photons?
Other than surreal images. You might use it to reduce the brightness
locally, in a scene.
> For photorealistic renderings it is not necessary. May be Christoph
> Lipka can shed more light onto this issue.
Nice one! :-)
--
Regards
Stephen
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Am 12.01.2014 21:12, schrieb Stephen:
> Two further images with the SDLS falling across the true spotlights shadow.
> One is intense dark the other has the red component, zero.
Where?
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On 13/01/2014 12:05 AM, clipka wrote:
> Am 12.01.2014 21:12, schrieb Stephen:
>
>> Two further images with the SDLS falling across the true spotlights
>> shadow.
>> One is intense dark the other has the red component, zero.
>
> Where?
>
Oops! I thought that I had posted the links.
N.B. Must take more water with it. :-)
Red
http://i.imgur.com/NNPwJS8.jpg
Black
http://i.imgur.com/dCQiQLl.jpg
--
Regards
Stephen
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MichaelJF <mi-### [at] t-online de> wrote:
> I'm not quite sure what we have here. Negative light is a feature which can be
> used artistically, but then the shadows must be affected too. In your additional
> scenes the shadows of the positive light still seems to be not influenced by the
> negative light. Most likely we're hunting down a bug here.
The shadows work in a completely logical manner: Inside the shadow
the rendering engine just says "this light is not visible from here,
ignore it". It doesn't care what color the light might be (even if
it's negative.)
If you want even more artistical effects, make some of the color
components of the light positive and others negative.
--
- Warp
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