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Hi,
I am rendering molecules as a hobby (because I find them very nice).
I already made various renderings using standard lights and I am now trying
radiosity.
I have a simple plane, a molecule over this floor and a sphere for ambient
illumination.
I also have an area light for specular effects.
I am using MegaPov 0.7
I have some little dark spots on the plane I cannot explain.
What is wrong with my parameters ?
The image is not rendered anti-aliased (it takes days to render)
Here is my source code (I removed the molecule because of the size but I can
mail
the entire source code if needed, it's only 9K zipped)
#version unofficial MegaPov 0.7;
declare CameraLocation = < 0, 0, 26.8337451068 > ;
global_settings {
ini_option "+QR"
radiosity {
pretrace_start 0.08
pretrace_end 0.01
count 1500
nearest_count 10
error_bound 0.02
recursion_limit 1
low_error_factor .2
gray_threshold 0.0
minimum_reuse 0.015
brightness 1
adc_bailout 0.01/2
}
}
light_source {
<0, 0, 80>
color rgb < 0.3, 0.3, 0.3 >
area_light <10, 0, 0>, <0, 10, 0>, 11, 11
adaptive 1
jitter
}
camera {
up < 0, 0, 1 >
right < 0, 0, 1 >
angle 35
translate CameraLocation
look_at < 0, 0, -1 >
}
// here should be the object (bunch of spheres an cylinders)
// ....
plane {
z, -3
texture { pigment { rgb <0.53, 0.63, 0.83> } finish { ambient .0 diffuse
.8 } }
}
// the source of ambient lighting
sphere {
<0, 0, 0>, 100
pigment { color rgb <0.8, 0.8, 0.8> }
finish { ambient 1.0 }
}
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Attachments:
Download 'c42h70c35.jpg' (50 KB)
Preview of image 'c42h70c35.jpg'
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Frederic Delhoume wrote:
> I have some little dark spots on the plane I cannot explain.
Raise the max_trace_level value until they disappear. It's a typical problem
with radiosity and reflections. This is going to slow the render, but you could
perhaps decrease the sample number and the error_count.
G.
--
**********************
http://www.oyonale.com
**********************
Graphic experiments
Pov-ray gallery
Post a reply to this message
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Gilles Tran wrote:
> This is going to slow the render, but you could
> perhaps decrease the sample number and the error_count.
Ahem, "count and nearest_count".
G.
--
**********************
http://www.oyonale.com
**********************
Graphic experiments
Pov-ray gallery
Post a reply to this message
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"Gilles Tran" <tra### [at] inapg inrafr> wrote in message
news:3B57E192.C7BF7602@inapg.inra.fr...
> Frederic Delhoume wrote:
>
> > I have some little dark spots on the plane I cannot explain.
>
> Raise the max_trace_level value until they disappear. It's a typical
problem
> with radiosity and reflections. This is going to slow the render, but you
could
> perhaps decrease the sample number and the error_count.
>
> G.
> --
>
> **********************
> http://www.oyonale.com
> **********************
> Graphic experiments
> Pov-ray gallery
>
>
Thank you, I'll try that (rendering time is already slow)
Fred.
Post a reply to this message
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It'd make a nice 'wreath' for the Christmastime desktop of some
chemist... ;-)
-MMW
Frederic Delhoume wrote:
>
> Hi,
>
> I am rendering molecules as a hobby (because I find them very nice).
> I already made various renderings using standard lights and I am now trying
> radiosity.
>
> I have a simple plane, a molecule over this floor and a sphere for ambient
> illumination.
> I also have an area light for specular effects.
> I am using MegaPov 0.7
>
> I have some little dark spots on the plane I cannot explain.
> What is wrong with my parameters ?
> The image is not rendered anti-aliased (it takes days to render)
>
> Here is my source code (I removed the molecule because of the size but I can
> mail
> the entire source code if needed, it's only 9K zipped)
>
> #version unofficial MegaPov 0.7;
> declare CameraLocation = < 0, 0, 26.8337451068 > ;
>
> global_settings {
> ini_option "+QR"
> radiosity {
> pretrace_start 0.08
> pretrace_end 0.01
> count 1500
>
> nearest_count 10
> error_bound 0.02
> recursion_limit 1
>
> low_error_factor .2
> gray_threshold 0.0
> minimum_reuse 0.015
> brightness 1
>
> adc_bailout 0.01/2
>
> }
> }
>
> light_source {
> <0, 0, 80>
> color rgb < 0.3, 0.3, 0.3 >
> area_light <10, 0, 0>, <0, 10, 0>, 11, 11
> adaptive 1
> jitter
> }
>
> camera {
> up < 0, 0, 1 >
> right < 0, 0, 1 >
> angle 35
> translate CameraLocation
> look_at < 0, 0, -1 >
> }
>
> // here should be the object (bunch of spheres an cylinders)
> // ....
>
> plane {
> z, -3
> texture { pigment { rgb <0.53, 0.63, 0.83> } finish { ambient .0 diffuse
> .8 } }
> }
>
> // the source of ambient lighting
> sphere {
> <0, 0, 0>, 100
> pigment { color rgb <0.8, 0.8, 0.8> }
> finish { ambient 1.0 }
> }
>
> ------------------------------------------------------------------------
> Name: c42h70c35.jpg
> c42h70c35.jpg Type: JPEG Image (image/jpeg)
> Encoding: base64
Post a reply to this message
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