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So yesterday I added moonlight to my fastcl.. fastsky system (clouds are
now only a small part of it, actually :))
However, while watching the real sky, I realized I had to add something
else too: light polution.
So here is a completely unrealistic picture of an uninhabited island
with lots of light polution!
..and a slightly more realistic version, without light polution :)
cu!
--
ZK
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Attachments:
Download 'lightpolution.jpg' (134 KB)
Download 'clearsky.jpg' (136 KB)
Preview of image 'lightpolution.jpg'
![lightpolution.jpg](/povray.binaries.images/attachment/%3C50294fb1%40news.povray.org%3E/lightpolution.jpg?ttop=443866&toff=1800&preview=1)
Preview of image 'clearsky.jpg'
![clearsky.jpg](/povray.binaries.images/attachment/%3C50294fb1%40news.povray.org%3E/clearsky.jpg?ttop=443866&toff=1800&preview=1)
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Am 13.08.2012 21:04, schrieb Zeger Knaepen:
> So yesterday I added moonlight to my fastcl.. fastsky system (clouds are
> now only a small part of it, actually :))
The moon's reflection in the water is way too bright.
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On 13/08/2012 21:44, clipka wrote:
> The moon's reflection in the water is way too bright.
yeah, I believe you're right, but my landscape-system, including water,
is for later, for now I'm just concentrating on the sky :)
..however, I fixed it:
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Attachments:
Download 'clearsky2.jpg' (134 KB)
Preview of image 'clearsky2.jpg'
![clearsky2.jpg](/povray.binaries.images/attachment/%3C5029654a%40news.povray.org%3E/clearsky2.jpg?ttop=443866&toff=1800&preview=1)
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Am 13.08.2012 22:36, schrieb Zeger Knaepen:
> On 13/08/2012 21:44, clipka wrote:
>> The moon's reflection in the water is way too bright.
>
> yeah, I believe you're right, but my landscape-system, including water,
> is for later, for now I'm just concentrating on the sky :)
>
> ...however, I fixed it:
Way better.
Still not perfect though, I think. Are you using highlights to fake the
reflection? Note that the default highlight parameterization is not
energy-conserving; try using the new "albedo" option (e.g. "specular
albedo 1.0" for a surface that reflects 100% of all incoming light). You
also need to take into account that your moon is not a full sphere, but
only some 40% of it.
Try with true reflection for reference.
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On 14/08/2012 11:51, clipka wrote:
> Way better.
>
> Still not perfect though, I think.
Just to be clear: I'm not going for perfection, I'm going for speed
while maintaining believability.
> Are you using highlights to fake the
> reflection?
yes
> Note that the default highlight parameterization is not
> energy-conserving; try using the new "albedo" option (e.g. "specular
> albedo 1.0" for a surface that reflects 100% of all incoming light).
let's give that a try :)
> You
> also need to take into account that your moon is not a full sphere, but
> only some 40% of it.
using specular highlights, the only way to take that into account, is by
lowering the brightness of the light_source, which I of course do :)
..though I'm not sure, I'm doing it the physically correct way, but it
looks OK
> Try with true reflection for reference.
I just did :o
Either my moon-"object" (it's not an object, it's pigment on the
sky_sphere.. btw: I lied, the sky exists of more than just a sky_sphere:
each cloud layer is a large sphere by itself) is too dim, or my
light_source was way too bright, or the specular highlights were way wrong.
Probably a combination of all three :)
Anyway, here's the revised version, with a brighter moon-pigment, dimmer
moon-light and redone specular hightlights.
Low resolution landscape and no area_lights this time though.
And yes, I know it's a very dark image, but what do you expect, it's the
middle of the night over there! :)
Just for fun, I also tried to adjust the time, while keeping the
location of the moon, so I'd get a more full moon.
Still have to work on an automatic moon placement.
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Attachments:
Download 'clearsky3.jpg' (80 KB)
Download 'clearsky4.jpg' (101 KB)
Preview of image 'clearsky3.jpg'
![clearsky3.jpg](/povray.binaries.images/attachment/%3C502a31a5%40news.povray.org%3E/clearsky3.jpg?ttop=443866&toff=1800&preview=1)
Preview of image 'clearsky4.jpg'
![clearsky4.jpg](/povray.binaries.images/attachment/%3C502a31a5%40news.povray.org%3E/clearsky4.jpg?ttop=443866&toff=1800&preview=1)
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Am 14.08.2012 13:08, schrieb Zeger Knaepen:
>> Try with true reflection for reference.
>
> I just did :o
> Either my moon-"object" (it's not an object, it's pigment on the
> sky_sphere.. btw: I lied, the sky exists of more than just a sky_sphere:
> each cloud layer is a large sphere by itself) is too dim, or my
> light_source was way too bright, or the specular highlights were way wrong.
>
> Probably a combination of all three :)
>
> Anyway, here's the revised version, with a brighter moon-pigment, dimmer
> moon-light and redone specular hightlights.
Now /that/ nails it.
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Now /that/ nails it too ;-)
Thomas
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