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Hello (again, again...) !!
This time it's a common lamp i'm building.
A made a glass half-sphere and put a light_source inside, but the light
source is really strong and illuminate the street outside the house, and
the others houses lol O_o
So i tried fade_distance and fade_power, but I'd be really glad if someone
could tell me about wich values I should use to make somehing realistic...
I'm using 1 unit for 1 meter, and the lamp is a common lamp... to light a
whole room but not MUCH more...
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Gyscos <gys### [at] gmail com> wrote:
> So i tried fade_distance and fade_power, but I'd be really glad if someone
> could tell me about wich values I should use to make somehing realistic...
> I'm using 1 unit for 1 meter, and the lamp is a common lamp... to light a
> whole room but not MUCH more...
Just use fade_power 2 and tune fade_distance until it looks good.
There's no "correct" value for fade_distance because that depends on
the brightness of the lamp in the first place. Just tune it until the
scene looks good.
--
- Warp
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Okay...
The doc said something about a new way of calculating one the fade_power
reached 1000, i thought that meant I had to use much higher value than just
1 or 2...
Thanks !
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Gyscos nous apporta ses lumieres en ce 29/04/2006 11:28:
> Okay...
> The doc said something about a new way of calculating one the fade_power
> reached 1000, i thought that meant I had to use much higher value than just
> 1 or 2...
> Thanks !
>
>
The fade_power you mention here is for the fading in the interior of object, NOT
light_source.
You may effectively need to use high rgb values for your lamp. It all depend on the
proportions
between your scene distances ant the fade_distance. If tou want "nominal" illumination
at a distance
of 1 and you have a fade_distance of 0.1 (10 cm), you need to multiply the light
intensity by 100,
if fade_distance is 0.01 (1 cm), you need 10000* the "nominal" value.
Normal, physicaly exact, fade_power is 2. A fade_power of 1 can be used to simulate a
very long and
narrow light_source.
--
Alain
-------------------------------------------------
Agnostic #2: Did someone shit?
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Gyscos <gys### [at] gmailcom> wrote:
> The doc said something about a new way of calculating one the fade_power
> reached 1000, i thought that meant I had to use much higher value than just
> 1 or 2...
As said, the fade_power 1000 is only effective in interior fading, and
unfortunately that "1000" is not a true value but just a hack which got
into the official povray (a keyword would have been much better). Don't
think about it as the value "1000" in this context because it isn't.
--
- Warp
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