Subject:
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Re: How would you do it?
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Newsgroups:
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lugnet.cad.ray
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Date:
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Thu, 2 Jun 2011 21:03:59 GMT
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Viewed:
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20888 times
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Larry Pieniazek wrote:
> I think the ambient light color is the color of the surface, which in
> this case is white already. I am confused about what diffuse does,
If I understand it correctly, 'ambient' is what you see if all lights are
off. I usually turn this down very low (zero). 'Diffuse' is reflected light
from
other surfaces, you'd want quite a lot of that.
> with just a default surface I was getting a lot of reflections
Yes, I think the default 'reflection' value is too high in many cases.
> Note: ultimately I would actually like my shadows to be slightly
> fuzzy, not sharp edged, so I am guessing maybe I should be using an
> area light placed a very long way away.
I'm still using the old POVRay 3.5 where the 'experimental radiosity' is
*very*
usable for getting life like renderings (at the cost of loooong rendering
times). I belive newer versions use other means to achieve the same thing
('media'?).
I'm still very proud of this render:
http://www.brickshelf.com/gallery/anders-isak/IdeaBookInspiration/playtable002.jpg
The general settings for that render is:
#declare AMB = 0;
#declare DIF = 0.8;
global_settings {
assumed_gamma 1.2
ambient_light 0
max_trace_level 25
adc_bailout 1/150
radiosity {
pretrace_start 0.08
pretrace_end 0.01
count 300
error_bound 0.1
recursion_limit 1
}
}
and *no* light sources except for the sky sphere
sky_sphere {
pigment {
gradient -y //weird sky vector...
color_map {
[0.5 rgb 1.25]
[1 rgb <.5,.7,1>*1.1]
}
}
}
(Just let me know if you want the full POV source for it)
> And I guess to get the shadows to be light I should place some low
> intensity shadowless
> lights at other positions?
Straight above (but far off) would be a candidate for this. And as said
above, with 'radiosity' no lights at all are needed.
Anders Isaksson
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Message has 1 Reply:
 | | Re: How would you do it?
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| (...) Hi Anders! I sent a note requesting it to the address shown in your post, is it still correct? Mine is, so you can use that one to send it. I really like the way that image looks (as well as the next one in the Brickshelf gallery) so would be (...) (13 years ago, 3-Jun-11, to lugnet.cad.ray)
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Message is in Reply To:
| | Re: How would you do it?
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| (...) I am considering using parallel instead of a light source that's very far away... I don't think Jeroen used "parallel" for his source(s) because the shadow angles are steeper in the foreground. (this will be less pronounced with light sources (...) (13 years ago, 2-Jun-11, to lugnet.cad.ray)
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